660677872 has 40 divisors (see below), whose sum is σ = 1311183936. Its totient is φ = 322350336.

The previous prime is 660677839. The next prime is 660677873. The reversal of 660677872 is 278776066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660677873) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 297438 + ... + 299650.

Almost surely, 2^660677872 is an apocalyptic number.

It is an amenable number.

660677872 is a deficient number, since it is larger than the sum of its proper divisors (650506064).

660677872 is a wasteful number, since it uses less digits than its factorization.

660677872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665 (or 2659 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 49.

The square root of 660677872 is about 25703.6548373962. The cubic root of 660677872 is about 870.9567455100.

The spelling of 660677872 in words is "six hundred sixty million, six hundred seventy-seven thousand, eight hundred seventy-two".