661082312 has 32 divisors (see below), whose sum is σ = 1354903200. Its totient is φ = 299894400.

The previous prime is 661082309. The next prime is 661082327. The reversal of 661082312 is 213280166.

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, 38639 + ... + 53057.

It is an arithmetic number, because the mean of its divisors is an integer number (42340725).

Almost surely, 2^661082312 is an apocalyptic number.

It is an amenable number.

661082312 is an abundant number, since it is smaller than the sum of its proper divisors (693820888).

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

661082312 is a wasteful number, since it uses less digits than its factorization.

661082312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14957 (or 14953 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 661082312 is about 25711.5209974050. The cubic root of 661082312 is about 871.1344306360.

The spelling of 661082312 in words is "six hundred sixty-one million, eighty-two thousand, three hundred twelve".