56665235511 has 12 divisors (see below), whose sum is σ = 83394120888. Its totient is φ = 37064053104.

The previous prime is 56665235509. The next prime is 56665235521. The reversal of 56665235511 is 11553256665.

It is not a de Polignac number, because 56665235511 - 2¹ = 56665235509 is a prime.

It is a super-2 number, since 2×56665235511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56665235521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59397045 + ... + 59397998.

It is an arithmetic number, because the mean of its divisors is an integer number (6949510074).

Almost surely, 2^56665235511 is an apocalyptic number.

56665235511 is a deficient number, since it is larger than the sum of its proper divisors (26728885377).

56665235511 is a wasteful number, since it uses less digits than its factorization.

56665235511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118795102 (or 118795099 counting only the distinct ones).

The product of its digits is 810000, while the sum is 45.

The spelling of 56665235511 in words is "fifty-six billion, six hundred sixty-five million, two hundred thirty-five thousand, five hundred eleven".