516664961 has 2 divisors, whose sum is σ = 516664962. Its totient is φ = 516664960.

The previous prime is 516664943. The next prime is 516665011. The reversal of 516664961 is 169466615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 491464561 + 25200400 = 22169^2 + 5020^2 .

It is a cyclic number.

It is not a de Polignac number, because 516664961 - 2¹⁰ = 516663937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (516664061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258332480 + 258332481.

It is an arithmetic number, because the mean of its divisors is an integer number (258332481).

Almost surely, 2^516664961 is an apocalyptic number.

It is an amenable number.

516664961 is a deficient number, since it is larger than the sum of its proper divisors (1).

516664961 is an equidigital number, since it uses as much as digits as its factorization.

516664961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 44.

The square root of 516664961 is about 22730.2653086144. The cubic root of 516664961 is about 802.4223252104.

The spelling of 516664961 in words is "five hundred sixteen million, six hundred sixty-four thousand, nine hundred sixty-one".