6778600564 has 18 divisors (see below), whose sum is σ = 11974418610. Its totient is φ = 3357354096.

The previous prime is 6778600547. The next prime is 6778600579. The reversal of 6778600564 is 4650068776.

It can be written as a sum of positive squares in only one way, i.e., 6218899600 + 559700964 = 78860^2 + 23658^2 .

It is a super-2 number, since 2×6778600564² = 91898851212522236192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1717177 + ... + 1721119.

Almost surely, 2^6778600564 is an apocalyptic number.

It is an amenable number.

6778600564 is a deficient number, since it is larger than the sum of its proper divisors (5195818046).

6778600564 is an equidigital number, since it uses as much as digits as its factorization.

6778600564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999 (or 4054 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The square root of 6778600564 is about 82332.2571292686. The cubic root of 6778600564 is about 1892.5470324705.

The spelling of 6778600564 in words is "six billion, seven hundred seventy-eight million, six hundred thousand, five hundred sixty-four".