316996661 has 4 divisors (see below), whose sum is σ = 317846892. Its totient is φ = 316146432.

The previous prime is 316996643. The next prime is 316996711. The reversal of 316996661 is 166699613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166699613 = 487 ⋅342299.

It can be written as a sum of positive squares in 2 ways, for example, as 204318436 + 112678225 = 14294^2 + 10615^2 .

It is a cyclic number.

It is not a de Polignac number, because 316996661 - 2¹⁴ = 316980277 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 (316996601) 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, 424556 + ... + 425301.

It is an arithmetic number, because the mean of its divisors is an integer number (79461723).

Almost surely, 2^316996661 is an apocalyptic number.

It is an amenable number.

316996661 is a deficient number, since it is larger than the sum of its proper divisors (850231).

316996661 is an equidigital number, since it uses as much as digits as its factorization.

316996661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850230.

The product of its digits is 314928, while the sum is 47.

The square root of 316996661 is about 17804.4000460560. The cubic root of 316996661 is about 681.8438001369.

The spelling of 316996661 in words is "three hundred sixteen million, nine hundred ninety-six thousand, six hundred sixty-one".