166316685 has 32 divisors (see below), whose sum is σ = 270988032. Its totient is φ = 87091200.

The previous prime is 166316681. The next prime is 166316699. The reversal of 166316685 is 586613661.

It is not a de Polignac number, because 166316685 - 2² = 166316681 is a prime.

It is a super-2 number, since 2×166316685² = 55322479418778450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166316681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219327 + ... + 220083.

It is an arithmetic number, because the mean of its divisors is an integer number (8468376).

Almost surely, 2^166316685 is an apocalyptic number.

166316685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166316685 is a deficient number, since it is larger than the sum of its proper divisors (104671347).

166316685 is a wasteful number, since it uses less digits than its factorization.

166316685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013.

The product of its digits is 155520, while the sum is 42.

The square root of 166316685 is about 12896.3826323508. The cubic root of 166316685 is about 549.9357335377.

The spelling of 166316685 in words is "one hundred sixty-six million, three hundred sixteen thousand, six hundred eighty-five".