66906800 has 30 divisors (see below), whose sum is σ = 160744548. Its totient is φ = 26762560.

The previous prime is 66906797. The next prime is 66906821. The reversal of 66906800 is 860966.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83234 + ... + 84033.

Almost surely, 2^66906800 is an apocalyptic number.

It is an amenable number.

66906800 is an abundant number, since it is smaller than the sum of its proper divisors (93837748).

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

66906800 is a wasteful number, since it uses less digits than its factorization.

66906800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167285 (or 167274 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 66906800 is about 8179.6576945493. The cubic root of 66906800 is about 405.9663961445.

The spelling of 66906800 in words is "sixty-six million, nine hundred six thousand, eight hundred".