166672251 has 24 divisors (see below), whose sum is σ = 250380000. Its totient is φ = 106710912.

The previous prime is 166672243. The next prime is 166672277. The reversal of 166672251 is 152276661.

It is a happy number.

It is not a de Polignac number, because 166672251 - 2³ = 166672243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166672201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50335 + ... + 53543.

It is an arithmetic number, because the mean of its divisors is an integer number (10432500).

Almost surely, 2^166672251 is an apocalyptic number.

166672251 is a deficient number, since it is larger than the sum of its proper divisors (83707749).

166672251 is a wasteful number, since it uses less digits than its factorization.

166672251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443 (or 3440 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 166672251 is about 12910.1607658464. The cubic root of 166672251 is about 550.3273544346.

The spelling of 166672251 in words is "one hundred sixty-six million, six hundred seventy-two thousand, two hundred fifty-one".