6660116601656 has 32 divisors (see below), whose sum is σ = 14273912988000. Its totient is φ = 2853888775296.

The previous prime is 6660116601581. The next prime is 6660116601673. The reversal of 6660116601656 is 6561066110666.

It is a happy number.

It is a congruent number.

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, 8949671 + ... + 9665238.

It is an arithmetic number, because the mean of its divisors is an integer number (446059780875).

Almost surely, 2^{6660116601656} is an apocalyptic number.

It is an amenable number.

6660116601656 is an abundant number, since it is smaller than the sum of its proper divisors (7613796386344).

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

6660116601656 is a wasteful number, since it uses less digits than its factorization.

6660116601656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18621311 (or 18621307 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 6660116601656 in words is "six trillion, six hundred sixty billion, one hundred sixteen million, six hundred one thousand, six hundred fifty-six".