6397636667 has 2 divisors, whose sum is σ = 6397636668. Its totient is φ = 6397636666.

The previous prime is 6397636633. The next prime is 6397636681. The reversal of 6397636667 is 7666367936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6397636667 - 2⁶ = 6397636603 is a prime.

It is not a weakly prime, because it can be changed into another prime (6397636607) 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, 3198818333 + 3198818334.

It is an arithmetic number, because the mean of its divisors is an integer number (3198818334).

Almost surely, 2^6397636667 is an apocalyptic number.

6397636667 is a deficient number, since it is larger than the sum of its proper divisors (1).

6397636667 is an equidigital number, since it uses as much as digits as its factorization.

6397636667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30862944, while the sum is 59.

The square root of 6397636667 is about 79985.2278048891. The cubic root of 6397636667 is about 1856.4069715577.

The spelling of 6397636667 in words is "six billion, three hundred ninety-seven million, six hundred thirty-six thousand, six hundred sixty-seven".