516716657 has 4 divisors (see below), whose sum is σ = 518346996. Its totient is φ = 515086320.

The previous prime is 516716639. The next prime is 516716677. The reversal of 516716657 is 756617615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115756081 + 400960576 = 10759^2 + 20024^2 .

It is a cyclic number.

It is not a de Polignac number, because 516716657 - 2⁶ = 516716593 is a prime.

It is a super-2 number, since 2×516716657² = 533992207242511298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516716617) 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, 814694 + ... + 815327.

It is an arithmetic number, because the mean of its divisors is an integer number (129586749).

Almost surely, 2^516716657 is an apocalyptic number.

It is an amenable number.

516716657 is a deficient number, since it is larger than the sum of its proper divisors (1630339).

516716657 is a wasteful number, since it uses less digits than its factorization.

516716657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630338.

The product of its digits is 264600, while the sum is 44.

The square root of 516716657 is about 22731.4024424363. The cubic root of 516716657 is about 802.4490870027.

The spelling of 516716657 in words is "five hundred sixteen million, seven hundred sixteen thousand, six hundred fifty-seven".