6597989957 has 4 divisors (see below), whose sum is σ = 7105527660. Its totient is φ = 6090452256.

The previous prime is 6597989953. The next prime is 6597989971. The reversal of 6597989957 is 7599897956.

6597989957 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1822350721 + 4775639236 = 42689^2 + 69106^2 .

It is a cyclic number.

It is not a de Polignac number, because 6597989957 - 2² = 6597989953 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 (6597989953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253768832 + ... + 253768857.

It is an arithmetic number, because the mean of its divisors is an integer number (1776381915).

Almost surely, 2^6597989957 is an apocalyptic number.

It is an amenable number.

6597989957 is a deficient number, since it is larger than the sum of its proper divisors (507537703).

6597989957 is a wasteful number, since it uses less digits than its factorization.

6597989957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507537702.

The product of its digits is 385786800, while the sum is 74.

The square root of 6597989957 is about 81228.0121448260. The cubic root of 6597989957 is about 1875.5870121261.

The spelling of 6597989957 in words is "six billion, five hundred ninety-seven million, nine hundred eighty-nine thousand, nine hundred fifty-seven".