1665102270465 has 24 divisors (see below), whose sum is σ = 2886209188200. Its totient is φ = 888044722944.

The previous prime is 1665102270421. The next prime is 1665102270467. The reversal of 1665102270465 is 5640722015661.

1665102270465 is a `hidden beast` number, since 1 + 6 + 6 + 510 + 2 + 2 + 70 + 4 + 65 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 112783132224 + 1552319138241 = 335832^2 + 1245921^2 .

It is not a de Polignac number, because 1665102270465 - 2¹⁶ = 1665102204929 is a prime.

It is a super-2 number, since 2×1665102270465² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1665102270465.

It is not an unprimeable number, because it can be changed into a prime (1665102270467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5932111 + ... + 6206459.

It is an arithmetic number, because the mean of its divisors is an integer number (120258716175).

Almost surely, 2^{1665102270465} is an apocalyptic number.

1665102270465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1665102270465 is a deficient number, since it is larger than the sum of its proper divisors (1221106917735).

1665102270465 is a wasteful number, since it uses less digits than its factorization.

1665102270465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409233 (or 409230 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 1665102270465 in words is "one trillion, six hundred sixty-five billion, one hundred two million, two hundred seventy thousand, four hundred sixty-five".