672221617166 has 32 divisors (see below), whose sum is σ = 1158023606400. Its totient is φ = 289440946080.

The previous prime is 672221617157. The next prime is 672221617189. The reversal of 672221617166 is 661716122276.

It is a self number, because there is not a number n which added to its sum of digits gives 672221617166.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3844940 + ... + 4015968.

It is an arithmetic number, because the mean of its divisors is an integer number (36188237700).

Almost surely, 2^672221617166 is an apocalyptic number.

672221617166 is a deficient number, since it is larger than the sum of its proper divisors (485801989234).

672221617166 is a wasteful number, since it uses less digits than its factorization.

672221617166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180464.

The product of its digits is 508032, while the sum is 47.

The spelling of 672221617166 in words is "six hundred seventy-two billion, two hundred twenty-one million, six hundred seventeen thousand, one hundred sixty-six".