671970964656 has 40 divisors (see below), whose sum is σ = 1765347456960. Its totient is φ = 220193874496.

The previous prime is 671970964627. The next prime is 671970964669. The reversal of 671970964656 is 656469079176.

It is a happy number.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118636110 + ... + 118641773.

It is an arithmetic number, because the mean of its divisors is an integer number (44133686424).

Almost surely, 2^671970964656 is an apocalyptic number.

It is an amenable number.

671970964656 is an abundant number, since it is smaller than the sum of its proper divisors (1093376492304).

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

671970964656 is a wasteful number, since it uses less digits than its factorization.

671970964656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237277953 (or 237277947 counting only the distinct ones).

The product of its (nonzero) digits is 102876480, while the sum is 66.

The spelling of 671970964656 in words is "six hundred seventy-one billion, nine hundred seventy million, nine hundred sixty-four thousand, six hundred fifty-six".