6797640657 has 16 divisors (see below), whose sum is σ = 9089163072. Its totient is φ = 4518958080.

The previous prime is 6797640653. The next prime is 6797640667. The reversal of 6797640657 is 7560467976.

It is not a de Polignac number, because 6797640657 - 2² = 6797640653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6797640597 and 6797640606.

It is not an unprimeable number, because it can be changed into a prime (6797640653) 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 15 ways as a sum of consecutive naturals, for example, 2783557 + ... + 2785997.

It is an arithmetic number, because the mean of its divisors is an integer number (568072692).

Almost surely, 2^6797640657 is an apocalyptic number.

It is an amenable number.

6797640657 is a deficient number, since it is larger than the sum of its proper divisors (2291522415).

6797640657 is a wasteful number, since it uses less digits than its factorization.

6797640657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4688.

The product of its (nonzero) digits is 13335840, while the sum is 57.

The square root of 6797640657 is about 82447.8056530312. The cubic root of 6797640657 is about 1894.3173381744.

The spelling of 6797640657 in words is "six billion, seven hundred ninety-seven million, six hundred forty thousand, six hundred fifty-seven".