666806888 has 16 divisors (see below), whose sum is σ = 1363923360. Its totient is φ = 303094000.

The previous prime is 666806879. The next prime is 666806897. The reversal of 666806888 is 888608666.

It is an interprime number because it is at equal distance from previous prime (666806879) and next prime (666806897).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3788588 + ... + 3788763.

It is an arithmetic number, because the mean of its divisors is an integer number (85245210).

Almost surely, 2^666806888 is an apocalyptic number.

It is an amenable number.

666806888 is an abundant number, since it is smaller than the sum of its proper divisors (697116472).

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

666806888 is a wasteful number, since it uses less digits than its factorization.

666806888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7577368 (or 7577364 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 56.

The square root of 666806888 is about 25822.6042063925. The cubic root of 666806888 is about 873.6417077515.

The spelling of 666806888 in words is "six hundred sixty-six million, eight hundred six thousand, eight hundred eighty-eight".