671622216556 has 12 divisors (see below), whose sum is σ = 1175396214160. Its totient is φ = 335794726800.

The previous prime is 671622216523. The next prime is 671622216571. The reversal of 671622216556 is 655612226176.

It is a super-2 number, since 2×671622216556² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 4002891 + ... + 4167298.

Almost surely, 2^671622216556 is an apocalyptic number.

It is an amenable number.

671622216556 is a deficient number, since it is larger than the sum of its proper divisors (503773997604).

671622216556 is a wasteful number, since it uses less digits than its factorization.

671622216556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8190744 (or 8190742 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The spelling of 671622216556 in words is "six hundred seventy-one billion, six hundred twenty-two million, two hundred sixteen thousand, five hundred fifty-six".