671960961 has 24 divisors (see below), whose sum is σ = 1158030240. Its totient is φ = 383976936.

The previous prime is 671960953. The next prime is 671960983. The reversal of 671960961 is 169069176.

It is not a de Polignac number, because 671960961 - 2³ = 671960953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671960161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252631 + ... + 255276.

It is an arithmetic number, because the mean of its divisors is an integer number (48251260).

Almost surely, 2^671960961 is an apocalyptic number.

It is an amenable number.

671960961 is a deficient number, since it is larger than the sum of its proper divisors (486069279).

671960961 is a wasteful number, since it uses less digits than its factorization.

671960961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507930 (or 507917 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 671960961 is about 25922.2098016354. The cubic root of 671960961 is about 875.8868661364.

The spelling of 671960961 in words is "six hundred seventy-one million, nine hundred sixty thousand, nine hundred sixty-one".