661352832 has 96 divisors (see below), whose sum is σ = 2175011280. Its totient is φ = 188955648.

The previous prime is 661352773. The next prime is 661352843. The reversal of 661352832 is 238253166.

It is a happy number.

661352832 is a `hidden beast` number, since 6 + 613 + 5 + 2 + 8 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32943 + ... + 49070.

Almost surely, 2^661352832 is an apocalyptic number.

It is an amenable number.

661352832 is an abundant number, since it is smaller than the sum of its proper divisors (1513658448).

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

661352832 is a wasteful number, since it uses less digits than its factorization.

661352832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82040 (or 82025 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 661352832 is about 25716.7811360598. The cubic root of 661352832 is about 871.2532394161.

The spelling of 661352832 in words is "six hundred sixty-one million, three hundred fifty-two thousand, eight hundred thirty-two".