672211221656 has 32 divisors (see below), whose sum is σ = 1437193679040. Its totient is φ = 292001253888.

The previous prime is 672211221653. The next prime is 672211221679. The reversal of 672211221656 is 656122112276.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672211221653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190103216 + ... + 190106751.

It is an arithmetic number, because the mean of its divisors is an integer number (44912302470).

Almost surely, 2^672211221656 is an apocalyptic number.

It is an amenable number.

672211221656 is an abundant number, since it is smaller than the sum of its proper divisors (764982457384).

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

672211221656 is a wasteful number, since it uses less digits than its factorization.

672211221656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380210003 (or 380209999 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The spelling of 672211221656 in words is "six hundred seventy-two billion, two hundred eleven million, two hundred twenty-one thousand, six hundred fifty-six".