669504724 has 24 divisors (see below), whose sum is σ = 1357872768. Its totient is φ = 282888480.

The previous prime is 669504673. The next prime is 669504749. The reversal of 669504724 is 427405966.

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 7 ways as a sum of consecutive naturals, for example, 166399 + ... + 170374.

It is an arithmetic number, because the mean of its divisors is an integer number (56578032).

Almost surely, 2^669504724 is an apocalyptic number.

It is an amenable number.

669504724 is an abundant number, since it is smaller than the sum of its proper divisors (688368044).

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

669504724 is a wasteful number, since it uses less digits than its factorization.

669504724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336855 (or 336853 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 669504724 is about 25874.7893517996. The cubic root of 669504724 is about 874.8183455283.

The spelling of 669504724 in words is "six hundred sixty-nine million, five hundred four thousand, seven hundred twenty-four".