166216664 has 16 divisors (see below), whose sum is σ = 313032600. Its totient is φ = 82741312.

The previous prime is 166216651. The next prime is 166216679. The reversal of 166216664 is 466612661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43949 + ... + 47580.

Almost surely, 2^166216664 is an apocalyptic number.

It is an amenable number.

166216664 is a deficient number, since it is larger than the sum of its proper divisors (146815936).

166216664 is a wasteful number, since it uses less digits than its factorization.

166216664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91762 (or 91758 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 166216664 is about 12892.5041787854. The cubic root of 166216664 is about 549.8254696914.

The spelling of 166216664 in words is "one hundred sixty-six million, two hundred sixteen thousand, six hundred sixty-four".