66904412 has 12 divisors (see below), whose sum is σ = 117212256. Its totient is φ = 33415200.

The previous prime is 66904393. The next prime is 66904457. The reversal of 66904412 is 21440966.

It is a happy number.

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, 4964 + ... + 12587.

It is an arithmetic number, because the mean of its divisors is an integer number (9767688).

Almost surely, 2^66904412 is an apocalyptic number.

It is an amenable number.

66904412 is a deficient number, since it is larger than the sum of its proper divisors (50307844).

66904412 is a wasteful number, since it uses less digits than its factorization.

66904412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18508 (or 18506 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66904412 is about 8179.5117213682. The cubic root of 66904412 is about 405.9615662454.

The spelling of 66904412 in words is "sixty-six million, nine hundred four thousand, four hundred twelve".