661376732 has 12 divisors (see below), whose sum is σ = 1162465080. Its totient is φ = 329243856.

The previous prime is 661376731. The next prime is 661376741. The reversal of 661376732 is 237673166.

It is a self number, because there is not a number n which added to its sum of digits gives 661376732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661376731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360098 + ... + 361929.

It is an arithmetic number, because the mean of its divisors is an integer number (96872090).

Almost surely, 2^661376732 is an apocalyptic number.

It is an amenable number.

661376732 is a deficient number, since it is larger than the sum of its proper divisors (501088348).

661376732 is a wasteful number, since it uses less digits than its factorization.

661376732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722260 (or 722258 counting only the distinct ones).

The product of its digits is 190512, while the sum is 41.

The square root of 661376732 is about 25717.2458089897. The cubic root of 661376732 is about 871.2637344199.

The spelling of 661376732 in words is "six hundred sixty-one million, three hundred seventy-six thousand, seven hundred thirty-two".