166312357 has 8 divisors (see below), whose sum is σ = 171133560. Its totient is φ = 161553600.

The previous prime is 166312331. The next prime is 166312387. The reversal of 166312357 is 753213661.

It can be written as a sum of positive squares in 4 ways, for example, as 91126116 + 75186241 = 9546^2 + 8671^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166312357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166312387) 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, 10182 + ... + 20887.

It is an arithmetic number, because the mean of its divisors is an integer number (21391695).

Almost surely, 2^166312357 is an apocalyptic number.

It is an amenable number.

166312357 is a deficient number, since it is larger than the sum of its proper divisors (4821203).

166312357 is a wasteful number, since it uses less digits than its factorization.

166312357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31223.

The product of its digits is 22680, while the sum is 34.

The square root of 166312357 is about 12896.2148322676. The cubic root of 166312357 is about 549.9309632356.

The spelling of 166312357 in words is "one hundred sixty-six million, three hundred twelve thousand, three hundred fifty-seven".