666378402088 has 16 divisors (see below), whose sum is σ = 1427953718880. Its totient is φ = 285590743728.

The previous prime is 666378402073. The next prime is 666378402143. The reversal of 666378402088 is 880204873666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5949807106 + ... + 5949807217.

It is an arithmetic number, because the mean of its divisors is an integer number (89247107430).

Almost surely, 2^666378402088 is an apocalyptic number.

It is an amenable number.

666378402088 is an abundant number, since it is smaller than the sum of its proper divisors (761575316792).

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

666378402088 is a wasteful number, since it uses less digits than its factorization.

666378402088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11899614336 (or 11899614332 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 58.

The spelling of 666378402088 in words is "six hundred sixty-six billion, three hundred seventy-eight million, four hundred two thousand, eighty-eight".