6659257944 has 16 divisors (see below), whose sum is σ = 16648144920. Its totient is φ = 2219752640.

The previous prime is 6659257897. The next prime is 6659257949. The reversal of 6659257944 is 4497529566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659257949) 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, 138734517 + ... + 138734564.

Almost surely, 2^6659257944 is an apocalyptic number.

It is an amenable number.

6659257944 is an abundant number, since it is smaller than the sum of its proper divisors (9988886976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6659257944 is a wasteful number, since it uses less digits than its factorization.

6659257944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277469090 (or 277469086 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 57.

The square root of 6659257944 is about 81604.2765055852. The cubic root of 6659257944 is about 1881.3746118433.

The spelling of 6659257944 in words is "six billion, six hundred fifty-nine million, two hundred fifty-seven thousand, nine hundred forty-four".