55660165511 has 4 divisors (see below), whose sum is σ = 58934292912. Its totient is φ = 52386038112.

The previous prime is 55660165507. The next prime is 55660165523. The reversal of 55660165511 is 11556106655.

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

It is a cyclic number.

It is not a de Polignac number, because 55660165511 - 2² = 55660165507 is a prime.

It is a super-2 number, since 2×55660165511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55660165411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637063675 + ... + 1637063708.

It is an arithmetic number, because the mean of its divisors is an integer number (14733573228).

Almost surely, 2^55660165511 is an apocalyptic number.

55660165511 is a deficient number, since it is larger than the sum of its proper divisors (3274127401).

55660165511 is a wasteful number, since it uses less digits than its factorization.

55660165511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274127400.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 55660165511 in words is "fifty-five billion, six hundred sixty million, one hundred sixty-five thousand, five hundred eleven".