667216244 has 6 divisors (see below), whose sum is σ = 1167628434. Its totient is φ = 333608120.

The previous prime is 667216171. The next prime is 667216267. The reversal of 667216244 is 442612766.

It can be written as a sum of positive squares in only one way, i.e., 628003600 + 39212644 = 25060^2 + 6262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 667216198 and 667216207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83402027 + ... + 83402034.

It is an arithmetic number, because the mean of its divisors is an integer number (194604739).

Almost surely, 2^667216244 is an apocalyptic number.

It is an amenable number.

667216244 is a deficient number, since it is larger than the sum of its proper divisors (500412190).

667216244 is a wasteful number, since it uses less digits than its factorization.

667216244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166804065 (or 166804063 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The square root of 667216244 is about 25830.5293015842. The cubic root of 667216244 is about 873.8204488146.

The spelling of 667216244 in words is "six hundred sixty-seven million, two hundred sixteen thousand, two hundred forty-four".