660825904 has 40 divisors (see below), whose sum is σ = 1357480080. Its totient is φ = 310560768.

The previous prime is 660825839. The next prime is 660825911. The reversal of 660825904 is 409528066.

It is a happy number.

660825904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 315292 + ... + 317380.

It is an arithmetic number, because the mean of its divisors is an integer number (33937002).

Almost surely, 2^660825904 is an apocalyptic number.

It is an amenable number.

660825904 is an abundant number, since it is smaller than the sum of its proper divisors (696654176).

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

660825904 is a wasteful number, since it uses less digits than its factorization.

660825904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277 (or 3271 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 660825904 is about 25706.5342666023. The cubic root of 660825904 is about 871.0217897351.

The spelling of 660825904 in words is "six hundred sixty million, eight hundred twenty-five thousand, nine hundred four".