55660660512 has 96 divisors (see below), whose sum is σ = 157956120000. Its totient is φ = 17101974528.

The previous prime is 55660660511. The next prime is 55660660519. The reversal of 55660660512 is 21506606655.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×55660660512² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55660660511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344887 + ... + 479862.

It is an arithmetic number, because the mean of its divisors is an integer number (1645376250).

Almost surely, 2^55660660512 is an apocalyptic number.

It is an amenable number.

55660660512 is an abundant number, since it is smaller than the sum of its proper divisors (102295459488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55660660512 is a wasteful number, since it uses less digits than its factorization.

55660660512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824818 (or 824810 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 42.

The spelling of 55660660512 in words is "fifty-five billion, six hundred sixty million, six hundred sixty thousand, five hundred twelve".