6700716581 has 4 divisors (see below), whose sum is σ = 7216156332. Its totient is φ = 6185276832.

The previous prime is 6700716577. The next prime is 6700716587. The reversal of 6700716581 is 1856170076.

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 3765785956 + 2934930625 = 61366^2 + 54175^2 .

It is a cyclic number.

It is not a de Polignac number, because 6700716581 - 2² = 6700716577 is a prime.

It is a super-2 number, since 2×6700716581² = 89799205397776659122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6700716587) 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, 257719856 + ... + 257719881.

It is an arithmetic number, because the mean of its divisors is an integer number (1804039083).

Almost surely, 2^6700716581 is an apocalyptic number.

It is an amenable number.

6700716581 is a deficient number, since it is larger than the sum of its proper divisors (515439751).

6700716581 is a wasteful number, since it uses less digits than its factorization.

6700716581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515439750.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 6700716581 is about 81857.9048168227. The cubic root of 6700716581 is about 1885.2708376352.

The spelling of 6700716581 in words is "six billion, seven hundred million, seven hundred sixteen thousand, five hundred eighty-one".