661446704 has 20 divisors (see below), whose sum is σ = 1281970776. Its totient is φ = 330615552.

The previous prime is 661446679. The next prime is 661446749. The reversal of 661446704 is 407644166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71192 + ... + 79944.

Almost surely, 2^661446704 is an apocalyptic number.

It is an amenable number.

661446704 is a deficient number, since it is larger than the sum of its proper divisors (620524072).

661446704 is a wasteful number, since it uses less digits than its factorization.

661446704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484 (or 13478 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 661446704 is about 25718.6061830730. The cubic root of 661446704 is about 871.2944591760.

The spelling of 661446704 in words is "six hundred sixty-one million, four hundred forty-six thousand, seven hundred four".