166273992 has 64 divisors (see below), whose sum is σ = 481968000. Its totient is φ = 53013312.

The previous prime is 166273979. The next prime is 166273993. The reversal of 166273992 is 299372661.

It is a happy number.

166273992 is a `hidden beast` number, since 16 + 627 + 3 + 9 + 9 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166273993) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11767 + ... + 21702.

It is an arithmetic number, because the mean of its divisors is an integer number (7530750).

Almost surely, 2^166273992 is an apocalyptic number.

166273992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166273992 is an abundant number, since it is smaller than the sum of its proper divisors (315694008).

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

166273992 is a wasteful number, since it uses less digits than its factorization.

166273992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33507 (or 33497 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 166273992 is about 12894.7272945185. The cubic root of 166273992 is about 549.8886738866. Note that the first 3 decimals are identical.

The spelling of 166273992 in words is "one hundred sixty-six million, two hundred seventy-three thousand, nine hundred ninety-two".