660656364 has 12 divisors (see below), whose sum is σ = 1541531544. Its totient is φ = 220218784.

The previous prime is 660656341. The next prime is 660656371. The reversal of 660656364 is 463656066.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27527337 + ... + 27527360.

It is an arithmetic number, because the mean of its divisors is an integer number (128460962).

Almost surely, 2^660656364 is an apocalyptic number.

It is an amenable number.

660656364 is an abundant number, since it is smaller than the sum of its proper divisors (880875180).

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

660656364 is a wasteful number, since it uses less digits than its factorization.

660656364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55054704 (or 55054702 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The square root of 660656364 is about 25703.2364499103. The cubic root of 660656364 is about 870.9472942369.

The spelling of 660656364 in words is "six hundred sixty million, six hundred fifty-six thousand, three hundred sixty-four".