660055155656 has 32 divisors (see below), whose sum is σ = 1332837602040. Its totient is φ = 304633087488.

The previous prime is 660055155623. The next prime is 660055155689. The reversal of 660055155656 is 656551550066.

660055155656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (660055155623) and next prime (660055155689).

It can be written as a sum of positive squares in 4 ways, for example, as 307729810756 + 352325344900 = 554734^2 + 593570^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6970580 + ... + 7064636.

Almost surely, 2^660055155656 is an apocalyptic number.

It is an amenable number.

660055155656 is an abundant number, since it is smaller than the sum of its proper divisors (672782446384).

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

660055155656 is a wasteful number, since it uses less digits than its factorization.

660055155656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161553 (or 161549 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 50.

The spelling of 660055155656 in words is "six hundred sixty billion, fifty-five million, one hundred fifty-five thousand, six hundred fifty-six".