6657997567 has 8 divisors (see below), whose sum is σ = 7417398240. Its totient is φ = 5933917920.

The previous prime is 6657997517. The next prime is 6657997573. The reversal of 6657997567 is 7657997566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6657997567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6657997517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8829859 + ... + 8830612.

It is an arithmetic number, because the mean of its divisors is an integer number (927174780).

Almost surely, 2^6657997567 is an apocalyptic number.

6657997567 is a deficient number, since it is larger than the sum of its proper divisors (759400673).

6657997567 is a wasteful number, since it uses less digits than its factorization.

6657997567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17660513.

The product of its digits is 150028200, while the sum is 67.

The square root of 6657997567 is about 81596.5536465849. The cubic root of 6657997567 is about 1881.2559103842.

Subtracting 6657997567 from its reverse (7657997566), we obtain a palindrome (999999999).

The spelling of 6657997567 in words is "six billion, six hundred fifty-seven million, nine hundred ninety-seven thousand, five hundred sixty-seven".