166316623 has 8 divisors (see below), whose sum is σ = 185862096. Its totient is φ = 147508800.

The previous prime is 166316621. The next prime is 166316629. The reversal of 166316623 is 326613661.

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 166316623 - 2¹ = 166316621 is a prime.

It is a super-2 number, since 2×166316623² = 55322438172248258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166316621) 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, 183936 + ... + 184837.

It is an arithmetic number, because the mean of its divisors is an integer number (23232762).

Almost surely, 2^166316623 is an apocalyptic number.

166316623 is a deficient number, since it is larger than the sum of its proper divisors (19545473).

166316623 is a wasteful number, since it uses less digits than its factorization.

166316623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368825.

The product of its digits is 23328, while the sum is 34.

The square root of 166316623 is about 12896.3802285758. The cubic root of 166316623 is about 549.9356652022.

The spelling of 166316623 in words is "one hundred sixty-six million, three hundred sixteen thousand, six hundred twenty-three".