66904628 has 12 divisors (see below), whose sum is σ = 133809312. Its totient is φ = 28673400.

The previous prime is 66904619. The next prime is 66904657. The reversal of 66904628 is 82640966.

66904628 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1194698 + ... + 1194753.

It is an arithmetic number, because the mean of its divisors is an integer number (11150776).

Almost surely, 2^66904628 is an apocalyptic number.

It is an amenable number.

66904628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66904628 is a wasteful number, since it uses less digits than its factorization.

66904628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389462 (or 2389460 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 66904628 is about 8179.5249250797. The cubic root of 66904628 is about 405.9620031254.

The spelling of 66904628 in words is "sixty-six million, nine hundred four thousand, six hundred twenty-eight".