6622765649 has 2 divisors, whose sum is σ = 6622765650. Its totient is φ = 6622765648.

The previous prime is 6622765579. The next prime is 6622765703. The reversal of 6622765649 is 9465672266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6220161424 + 402604225 = 78868^2 + 20065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6622765649 is a prime.

It is a super-2 number, since 2×6622765649² = 87722049683148782402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6622765649.

It is not a weakly prime, because it can be changed into another prime (6622765949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3311382824 + 3311382825.

It is an arithmetic number, because the mean of its divisors is an integer number (3311382825).

Almost surely, 2^6622765649 is an apocalyptic number.

It is an amenable number.

6622765649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6622765649 is an equidigital number, since it uses as much as digits as its factorization.

6622765649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 53.

The square root of 6622765649 is about 81380.3763139493. The cubic root of 6622765649 is about 1877.9317122166.

The spelling of 6622765649 in words is "six billion, six hundred twenty-two million, seven hundred sixty-five thousand, six hundred forty-nine".