665066604 has 24 divisors (see below), whose sum is σ = 1553162688. Its totient is φ = 221497360.

The previous prime is 665066593. The next prime is 665066621. The reversal of 665066604 is 406660566.

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, 9102 + ... + 37589.

It is an arithmetic number, because the mean of its divisors is an integer number (64715112).

Almost surely, 2^665066604 is an apocalyptic number.

It is an amenable number.

665066604 is an abundant number, since it is smaller than the sum of its proper divisors (888096084).

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

665066604 is a wasteful number, since it uses less digits than its factorization.

665066604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47885 (or 47883 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 665066604 is about 25788.8852802908. The cubic root of 665066604 is about 872.8810131103.

The spelling of 665066604 in words is "six hundred sixty-five million, sixty-six thousand, six hundred four".