66308904 has 24 divisors (see below), whose sum is σ = 179586810. Its totient is φ = 22102944.

The previous prime is 66308903. The next prime is 66308927. The reversal of 66308904 is 40980366.

It can be written as a sum of positive squares in only one way, i.e., 63968004 + 2340900 = 7998^2 + 1530^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66308903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 460407 + ... + 460550.

Almost surely, 2^66308904 is an apocalyptic number.

It is an amenable number.

66308904 is an abundant number, since it is smaller than the sum of its proper divisors (113277906).

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

66308904 is a wasteful number, since it uses less digits than its factorization.

66308904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920969 (or 920962 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 66308904 is about 8143.0279380584. The cubic root of 66308904 is about 404.7535034108.

The spelling of 66308904 in words is "sixty-six million, three hundred eight thousand, nine hundred four".