10665401449 has 4 divisors (see below), whose sum is σ = 10666445140. Its totient is φ = 10664357760.

The previous prime is 10665401447. The next prime is 10665401471. The reversal of 10665401449 is 94410456601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5680335424 + 4985066025 = 75368^2 + 70605^2 .

It is a cyclic number.

It is not a de Polignac number, because 10665401449 - 2¹ = 10665401447 is a prime.

It is a super-2 number, since 2×10665401449² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10665401447) 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 3 ways as a sum of consecutive naturals, for example, 506364 + ... + 527005.

It is an arithmetic number, because the mean of its divisors is an integer number (2666611285).

Almost surely, 2^10665401449 is an apocalyptic number.

It is an amenable number.

10665401449 is a deficient number, since it is larger than the sum of its proper divisors (1043691).

10665401449 is a wasteful number, since it uses less digits than its factorization.

10665401449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043690.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 10665401449 in words is "ten billion, six hundred sixty-five million, four hundred one thousand, four hundred forty-nine".