66900068 has 24 divisors (see below), whose sum is σ = 118755168. Its totient is φ = 32973696.

The previous prime is 66900059. The next prime is 66900089. The reversal of 66900068 is 86000966.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127655 + ... + 128177.

It is an arithmetic number, because the mean of its divisors is an integer number (4948132).

Almost surely, 2^66900068 is an apocalyptic number.

It is an amenable number.

66900068 is a deficient number, since it is larger than the sum of its proper divisors (51855100).

66900068 is a wasteful number, since it uses less digits than its factorization.

66900068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 921 counting only the distinct ones).

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

The square root of 66900068 is about 8179.2461755348. The cubic root of 66900068 is about 405.9527799030.

The spelling of 66900068 in words is "sixty-six million, nine hundred thousand, sixty-eight".