1665114094449 has 135 divisors (see below), whose sum is σ = 2771046165459. Its totient is φ = 995976933120.

The previous prime is 1665114094447. The next prime is 1665114094451. The reversal of 1665114094449 is 9444904115661.

It is a happy number.

The square root of 1665114094449 is 1290393.

It is a perfect power (a square), and thus also a powerful number.

1665114094449 is a `hidden beast` number, since 1 + 6 + 6 + 51 + 140 + 9 + 4 + 449 = 666.

It is an interprime number because it is at equal distance from previous prime (1665114094447) and next prime (1665114094451).

It can be written as a sum of positive squares in 13 ways, for example, as 981793631025 + 683320463424 = 990855^2 + 826632^2 .

It is not a de Polignac number, because 1665114094449 - 2¹ = 1665114094447 is a prime.

It is a super-2 number, since 2×1665114094449² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1665114094395 and 1665114094404.

It is not an unprimeable number, because it can be changed into a prime (1665114094447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 6190015087 + ... + 6190015355.

Almost surely, 2^{1665114094449} is an apocalyptic number.

1665114094449 is the 1290393-rd square number.

1665114094449 is the 645197-th centered octagonal number.

It is an amenable number.

1665114094449 is a deficient number, since it is larger than the sum of its proper divisors (1105932071010).

1665114094449 is an frugal number, since it uses more digits than its factorization.

1665114094449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 1665114094449 in words is "one trillion, six hundred sixty-five billion, one hundred fourteen million, ninety-four thousand, four hundred forty-nine".