6626764651 has 4 divisors (see below), whose sum is σ = 7136515792. Its totient is φ = 6117013512.

The previous prime is 6626764637. The next prime is 6626764657. The reversal of 6626764651 is 1564676266.

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

It is a cyclic number.

It is not a de Polignac number, because 6626764651 - 2⁵ = 6626764619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6626764595 and 6626764604.

It is not an unprimeable number, because it can be changed into a prime (6626764657) 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, 254875551 + ... + 254875576.

It is an arithmetic number, because the mean of its divisors is an integer number (1784128948).

Almost surely, 2^6626764651 is an apocalyptic number.

6626764651 is a deficient number, since it is larger than the sum of its proper divisors (509751141).

6626764651 is a wasteful number, since it uses less digits than its factorization.

6626764651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509751140.

The product of its digits is 2177280, while the sum is 49.

The square root of 6626764651 is about 81404.9424236637. The cubic root of 6626764651 is about 1878.3096178645.

The spelling of 6626764651 in words is "six billion, six hundred twenty-six million, seven hundred sixty-four thousand, six hundred fifty-one".