664334632 has 32 divisors (see below), whose sum is σ = 1344719880. Its totient is φ = 305867520.

The previous prime is 664334611. The next prime is 664334641. The reversal of 664334632 is 236433466.

It can be written as a sum of positive squares in 4 ways, for example, as 393863716 + 270470916 = 19846^2 + 16446^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664334591 and 664334600.

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, 36198 + ... + 51370.

Almost surely, 2^664334632 is an apocalyptic number.

It is an amenable number.

664334632 is an abundant number, since it is smaller than the sum of its proper divisors (680385248).

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

664334632 is a wasteful number, since it uses less digits than its factorization.

664334632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15613 (or 15609 counting only the distinct ones).

The product of its digits is 186624, while the sum is 37.

The square root of 664334632 is about 25774.6897556498. The cubic root of 664334632 is about 872.5606647419.

The spelling of 664334632 in words is "six hundred sixty-four million, three hundred thirty-four thousand, six hundred thirty-two".