6648740769 has 32 divisors (see below), whose sum is σ = 9918534528. Its totient is φ = 3926592000.

The previous prime is 6648740753. The next prime is 6648740771. The reversal of 6648740769 is 9670478466.

It is a happy number.

It is not a de Polignac number, because 6648740769 - 2⁴ = 6648740753 is a prime.

It is a super-2 number, since 2×6648740769² = 88411507626725422722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6648740869) 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 in 31 ways as a sum of consecutive naturals, for example, 1379007 + ... + 1383819.

It is an arithmetic number, because the mean of its divisors is an integer number (309954204).

Almost surely, 2^6648740769 is an apocalyptic number.

It is an amenable number.

6648740769 is a deficient number, since it is larger than the sum of its proper divisors (3269793759).

6648740769 is a wasteful number, since it uses less digits than its factorization.

6648740769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The square root of 6648740769 is about 81539.8109453290. The cubic root of 6648740769 is about 1880.3836519917.

The spelling of 6648740769 in words is "six billion, six hundred forty-eight million, seven hundred forty thousand, seven hundred sixty-nine".