6516969971 has 2 divisors, whose sum is σ = 6516969972. Its totient is φ = 6516969970.

The previous prime is 6516969919. The next prime is 6516969997. The reversal of 6516969971 is 1799696156.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6516969971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6516969971.

It is not a weakly prime, because it can be changed into another prime (6516969911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3258484985 + 3258484986.

It is an arithmetic number, because the mean of its divisors is an integer number (3258484986).

Almost surely, 2^6516969971 is an apocalyptic number.

6516969971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6516969971 is an equidigital number, since it uses as much as digits as its factorization.

6516969971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5511240, while the sum is 59.

The square root of 6516969971 is about 80727.7521735865. The cubic root of 6516969971 is about 1867.8782851631.

The spelling of 6516969971 in words is "six billion, five hundred sixteen million, nine hundred sixty-nine thousand, nine hundred seventy-one".