6764137657 has 2 divisors, whose sum is σ = 6764137658. Its totient is φ = 6764137656.

The previous prime is 6764137577. The next prime is 6764137663. The reversal of 6764137657 is 7567314676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6377779321 + 386358336 = 79861^2 + 19656^2 .

It is a cyclic number.

It is not a de Polignac number, because 6764137657 - 2⁷ = 6764137529 is a prime.

It is not a weakly prime, because it can be changed into another prime (6764137687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3382068828 + 3382068829.

It is an arithmetic number, because the mean of its divisors is an integer number (3382068829).

Almost surely, 2^6764137657 is an apocalyptic number.

It is an amenable number.

6764137657 is a deficient number, since it is larger than the sum of its proper divisors (1).

6764137657 is an equidigital number, since it uses as much as digits as its factorization.

6764137657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4445280, while the sum is 52.

The square root of 6764137657 is about 82244.3776619411. The cubic root of 6764137657 is about 1891.2000867176.

The spelling of 6764137657 in words is "six billion, seven hundred sixty-four million, one hundred thirty-seven thousand, six hundred fifty-seven".