166163393 has 8 divisors (see below), whose sum is σ = 182191680. Its totient is φ = 150288880.

The previous prime is 166163383. The next prime is 166163399. The reversal of 166163393 is 393361661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166163393 - 2²⁴ = 149386177 is a prime.

It is a super-2 number, since 2×166163393² = 55220546346544898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166163399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36173 + ... + 40506.

It is an arithmetic number, because the mean of its divisors is an integer number (22773960).

Almost surely, 2^166163393 is an apocalyptic number.

It is an amenable number.

166163393 is a deficient number, since it is larger than the sum of its proper divisors (16028287).

166163393 is a wasteful number, since it uses less digits than its factorization.

166163393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76887.

The product of its digits is 52488, while the sum is 38.

The square root of 166163393 is about 12890.4380453110. The cubic root of 166163393 is about 549.7667253163.

The spelling of 166163393 in words is "one hundred sixty-six million, one hundred sixty-three thousand, three hundred ninety-three".