666055055600 has 60 divisors (see below), whose sum is σ = 1745669761800. Its totient is φ = 242201836800.

The previous prime is 666055055569. The next prime is 666055055621. The reversal of 666055055600 is 6550550666.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75683675 + ... + 75692474.

It is an arithmetic number, because the mean of its divisors is an integer number (29094496030).

Almost surely, 2^666055055600 is an apocalyptic number.

It is an amenable number.

666055055600 is an abundant number, since it is smaller than the sum of its proper divisors (1079614706200).

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

666055055600 is a wasteful number, since it uses less digits than its factorization.

666055055600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151376178 (or 151376167 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 666055055600 in words is "six hundred sixty-six billion, fifty-five million, fifty-five thousand, six hundred".