661304696 has 32 divisors (see below), whose sum is σ = 1336411440. Its totient is φ = 304969728.

The previous prime is 661304689. The next prime is 661304701. The reversal of 661304696 is 696403166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209240 + ... + 212376.

Almost surely, 2^661304696 is an apocalyptic number.

It is an amenable number.

661304696 is an abundant number, since it is smaller than the sum of its proper divisors (675106744).

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

661304696 is a wasteful number, since it uses less digits than its factorization.

661304696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5183 (or 5179 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 661304696 is about 25715.8452320743. The cubic root of 661304696 is about 871.2321010960.

The spelling of 661304696 in words is "six hundred sixty-one million, three hundred four thousand, six hundred ninety-six".