664572498 has 16 divisors (see below), whose sum is σ = 1329453216. Its totient is φ = 221472800.

The previous prime is 664572457. The next prime is 664572499. The reversal of 664572498 is 894275466.

It is a self number, because there is not a number n which added to its sum of digits gives 664572498.

It is not an unprimeable number, because it can be changed into a prime (664572499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22798 + ... + 42998.

It is an arithmetic number, because the mean of its divisors is an integer number (83090826).

Almost surely, 2^664572498 is an apocalyptic number.

664572498 is an abundant number, since it is smaller than the sum of its proper divisors (664880718).

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

664572498 is a wasteful number, since it uses less digits than its factorization.

664572498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25689.

The product of its digits is 2903040, while the sum is 51.

The square root of 664572498 is about 25779.3036756232. The cubic root of 664572498 is about 872.6647928618.

The spelling of 664572498 in words is "six hundred sixty-four million, five hundred seventy-two thousand, four hundred ninety-eight".