166224959272 has 8 divisors (see below), whose sum is σ = 311671798650. Its totient is φ = 83112479632.

The previous prime is 166224959237. The next prime is 166224959281. The reversal of 166224959272 is 272959422661.

It can be written as a sum of positive squares in only one way, i.e., 157953784356 + 8271174916 = 397434^2 + 90946^2 .

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 (55) 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 as a sum of consecutive naturals, namely, 10389059947 + ... + 10389059962.

Almost surely, 2^166224959272 is an apocalyptic number.

It is an amenable number.

166224959272 is a deficient number, since it is larger than the sum of its proper divisors (145446839378).

166224959272 is a wasteful number, since it uses less digits than its factorization.

166224959272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20778119915 (or 20778119911 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 166224959272 in words is "one hundred sixty-six billion, two hundred twenty-four million, nine hundred fifty-nine thousand, two hundred seventy-two".