664527732 has 24 divisors (see below), whose sum is σ = 1691525472. Its totient is φ = 201372000.

The previous prime is 664527653. The next prime is 664527737. The reversal of 664527732 is 237725466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664527737) 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, 2517019 + ... + 2517282.

It is an arithmetic number, because the mean of its divisors is an integer number (70480228).

Almost surely, 2^664527732 is an apocalyptic number.

It is an amenable number.

664527732 is an abundant number, since it is smaller than the sum of its proper divisors (1026997740).

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

664527732 is a wasteful number, since it uses less digits than its factorization.

664527732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034319 (or 5034317 counting only the distinct ones).

The product of its digits is 423360, while the sum is 42.

The square root of 664527732 is about 25778.4354063624. The cubic root of 664527732 is about 872.6451980147.

The spelling of 664527732 in words is "six hundred sixty-four million, five hundred twenty-seven thousand, seven hundred thirty-two".