664652562 has 24 divisors (see below), whose sum is σ = 1546335216. Its totient is φ = 189900648.

The previous prime is 664652561. The next prime is 664652563. The reversal of 664652562 is 265256466.

It is an interprime number because it is at equal distance from previous prime (664652561) and next prime (664652563).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (664652561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1130068 + ... + 1130655.

It is an arithmetic number, because the mean of its divisors is an integer number (64430634).

Almost surely, 2^664652562 is an apocalyptic number.

664652562 is an abundant number, since it is smaller than the sum of its proper divisors (881682654).

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

664652562 is a wasteful number, since it uses less digits than its factorization.

664652562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2260742 (or 2260735 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The square root of 664652562 is about 25780.8565024516. The cubic root of 664652562 is about 872.6998360555.

The spelling of 664652562 in words is "six hundred sixty-four million, six hundred fifty-two thousand, five hundred sixty-two".