664553530 has 16 divisors (see below), whose sum is σ = 1211339520. Its totient is φ = 262456272.

The previous prime is 664553507. The next prime is 664553537. The reversal of 664553530 is 35355466.

It is a self number, because there is not a number n which added to its sum of digits gives 664553530.

It is not an unprimeable number, because it can be changed into a prime (664553537) 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, 419814 + ... + 421393.

It is an arithmetic number, because the mean of its divisors is an integer number (75708720).

Almost surely, 2^664553530 is an apocalyptic number.

664553530 is a deficient number, since it is larger than the sum of its proper divisors (546785990).

664553530 is a wasteful number, since it uses less digits than its factorization.

664553530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841293.

The product of its (nonzero) digits is 162000, while the sum is 37.

The square root of 664553530 is about 25778.9357809821. The cubic root of 664553530 is about 872.6564903498.

The spelling of 664553530 in words is "six hundred sixty-four million, five hundred fifty-three thousand, five hundred thirty".