6660155020656 has 40 divisors (see below), whose sum is σ = 17231508898560. Its totient is φ = 2216682844096.

The previous prime is 6660155020627. The next prime is 6660155020667. The reversal of 6660155020656 is 6560205510666.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 105243960 + ... + 105307223.

It is an arithmetic number, because the mean of its divisors is an integer number (430787722464).

Almost surely, 2^{6660155020656} is an apocalyptic number.

It is an amenable number.

6660155020656 is an abundant number, since it is smaller than the sum of its proper divisors (10571353877904).

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

6660155020656 is a wasteful number, since it uses less digits than its factorization.

6660155020656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210551853 (or 210551847 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 6660155020656 in words is "six trillion, six hundred sixty billion, one hundred fifty-five million, twenty thousand, six hundred fifty-six".