166812317 has 12 divisors (see below), whose sum is σ = 199293660. Its totient is φ = 139116096.

The previous prime is 166812281. The next prime is 166812319. The reversal of 166812317 is 713218661.

It can be written as a sum of positive squares in 2 ways, for example, as 113507716 + 53304601 = 10654^2 + 7301^2 .

It is a de Polignac number, because none of the positive numbers 2^k-166812317 is a prime.

It is a super-3 number, since 3×166812317³ (a number of 26 digits) contains 333 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 (166812319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44192 + ... + 47817.

It is an arithmetic number, because the mean of its divisors is an integer number (16607805).

Almost surely, 2^166812317 is an apocalyptic number.

It is an amenable number.

166812317 is a deficient number, since it is larger than the sum of its proper divisors (32481343).

166812317 is an equidigital number, since it uses as much as digits as its factorization.

166812317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92060 (or 92053 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 166812317 is about 12915.5842686268. The cubic root of 166812317 is about 550.4814704085.

The spelling of 166812317 in words is "one hundred sixty-six million, eight hundred twelve thousand, three hundred seventeen".