661358432 has 48 divisors (see below), whose sum is σ = 1519741440. Its totient is φ = 277404288.

The previous prime is 661358431. The next prime is 661358483. The reversal of 661358432 is 234853166.

661358432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661358431) 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, 20882 + ... + 41937.

It is an arithmetic number, because the mean of its divisors is an integer number (31661280).

Almost surely, 2^661358432 is an apocalyptic number.

It is an amenable number.

661358432 is an abundant number, since it is smaller than the sum of its proper divisors (858383008).

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

661358432 is a wasteful number, since it uses less digits than its factorization.

661358432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62883 (or 62875 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 661358432 is about 25716.8900141522. The cubic root of 661358432 is about 871.2556985192.

The spelling of 661358432 in words is "six hundred sixty-one million, three hundred fifty-eight thousand, four hundred thirty-two".