6657164399 has 2 divisors, whose sum is σ = 6657164400. Its totient is φ = 6657164398.

The previous prime is 6657164377. The next prime is 6657164429. The reversal of 6657164399 is 9934617566.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6657164399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6657164299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328582199 + 3328582200.

It is an arithmetic number, because the mean of its divisors is an integer number (3328582200).

Almost surely, 2^6657164399 is an apocalyptic number.

6657164399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657164399 is an equidigital number, since it uses as much as digits as its factorization.

6657164399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 56.

The square root of 6657164399 is about 81591.4480751506. The cubic root of 6657164399 is about 1881.1774349570.

The spelling of 6657164399 in words is "six billion, six hundred fifty-seven million, one hundred sixty-four thousand, three hundred ninety-nine".