166753257 has 16 divisors (see below), whose sum is σ = 242784000. Its totient is φ = 100965200.

The previous prime is 166753241. The next prime is 166753261. The reversal of 166753257 is 752357661.

It is a cyclic number.

It is not a de Polignac number, because 166753257 - 2⁴ = 166753241 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (166753217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47782 + ... + 51152.

It is an arithmetic number, because the mean of its divisors is an integer number (15174000).

Almost surely, 2^166753257 is an apocalyptic number.

It is an amenable number.

166753257 is a deficient number, since it is larger than the sum of its proper divisors (76030743).

166753257 is a wasteful number, since it uses less digits than its factorization.

166753257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4884.

The product of its digits is 264600, while the sum is 42.

The square root of 166753257 is about 12913.2976810728. The cubic root of 166753257 is about 550.4164966426.

The spelling of 166753257 in words is "one hundred sixty-six million, seven hundred fifty-three thousand, two hundred fifty-seven".