661710912 has 56 divisors (see below), whose sum is σ = 1775472192. Its totient is φ = 217459200.

The previous prime is 661710899. The next prime is 661710919. The reversal of 661710912 is 219017166.

It is a super-2 number, since 2×661710912² = 875722662119743488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661710919) 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, 10639 + ... + 37902.

Almost surely, 2^661710912 is an apocalyptic number.

It is an amenable number.

661710912 is an abundant number, since it is smaller than the sum of its proper divisors (1113761280).

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

661710912 is a wasteful number, since it uses less digits than its factorization.

661710912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48627 (or 48617 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 661710912 is about 25723.7421849932. The cubic root of 661710912 is about 871.4104535668.

The spelling of 661710912 in words is "six hundred sixty-one million, seven hundred ten thousand, nine hundred twelve".