166695313 has 4 divisors (see below), whose sum is σ = 167173300. Its totient is φ = 166217328.

The previous prime is 166695311. The next prime is 166695317. The reversal of 166695313 is 313596661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313596661 = 7 ⋅44799523.

It can be written as a sum of positive squares in 2 ways, for example, as 147185424 + 19509889 = 12132^2 + 4417^2 .

It is a cyclic number.

It is not a de Polignac number, because 166695313 - 2¹ = 166695311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166695311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238470 + ... + 239167.

It is an arithmetic number, because the mean of its divisors is an integer number (41793325).

Almost surely, 2^166695313 is an apocalyptic number.

It is an amenable number.

166695313 is a deficient number, since it is larger than the sum of its proper divisors (477987).

166695313 is an equidigital number, since it uses as much as digits as its factorization.

166695313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477986.

The product of its digits is 87480, while the sum is 40.

The square root of 166695313 is about 12911.0539074082. The cubic root of 166695313 is about 550.3527357124.

The spelling of 166695313 in words is "one hundred sixty-six million, six hundred ninety-five thousand, three hundred thirteen".