66888708 has 48 divisors (see below), whose sum is σ = 160392960. Its totient is φ = 21685504.

The previous prime is 66888707. The next prime is 66888709. The reversal of 66888708 is 80788866.

It is an interprime number because it is at equal distance from previous prime (66888707) and next prime (66888709).

It is not an unprimeable number, because it can be changed into a prime (66888707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131158 + ... + 131666.

It is an arithmetic number, because the mean of its divisors is an integer number (3341520).

Almost surely, 2^66888708 is an apocalyptic number.

It is an amenable number.

66888708 is an abundant number, since it is smaller than the sum of its proper divisors (93504252).

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

66888708 is a wasteful number, since it uses less digits than its factorization.

66888708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The square root of 66888708 is about 8178.5517055283. The cubic root of 66888708 is about 405.9298009297.

The spelling of 66888708 in words is "sixty-six million, eight hundred eighty-eight thousand, seven hundred eight".