166224664 has 8 divisors (see below), whose sum is σ = 311671260. Its totient is φ = 83112328.

The previous prime is 166224661. The next prime is 166224727. The reversal of 166224664 is 466422661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166224661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10389034 + ... + 10389049.

Almost surely, 2^166224664 is an apocalyptic number.

It is an amenable number.

166224664 is a deficient number, since it is larger than the sum of its proper divisors (145446596).

166224664 is a wasteful number, since it uses less digits than its factorization.

166224664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778089 (or 20778085 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 166224664 is about 12892.8144328537. The cubic root of 166224664 is about 549.8342905743.

The spelling of 166224664 in words is "one hundred sixty-six million, two hundred twenty-four thousand, six hundred sixty-four".