166624872228 has 30 divisors (see below), whose sum is σ = 435590330406. Its totient is φ = 55541623968.

The previous prime is 166624872199. The next prime is 166624872301. The reversal of 166624872228 is 822278426661.

It can be written as a sum of positive squares in only one way, i.e., 137439249984 + 29185622244 = 370728^2 + 170838^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 257136825 + ... + 257137472.

Almost surely, 2^166624872228 is an apocalyptic number.

166624872228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166624872228 is an abundant number, since it is smaller than the sum of its proper divisors (268965458178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166624872228 is a wasteful number, since it uses less digits than its factorization.

166624872228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514274313 (or 514274302 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The spelling of 166624872228 in words is "one hundred sixty-six billion, six hundred twenty-four million, eight hundred seventy-two thousand, two hundred twenty-eight".