6615232257 has 32 divisors (see below), whose sum is σ = 9137802240. Its totient is φ = 4253688000.

The previous prime is 6615232241. The next prime is 6615232271. The reversal of 6615232257 is 7522325166.

It is a happy number.

It is not a de Polignac number, because 6615232257 - 2⁴ = 6615232241 is a prime.

It is a super-2 number, since 2×6615232257² = 87522595628106628098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6615232277) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7884244 + ... + 7885082.

It is an arithmetic number, because the mean of its divisors is an integer number (285556320).

Almost surely, 2^6615232257 is an apocalyptic number.

It is an amenable number.

6615232257 is a deficient number, since it is larger than the sum of its proper divisors (2522569983).

6615232257 is a wasteful number, since it uses less digits than its factorization.

6615232257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413.

The product of its digits is 151200, while the sum is 39.

The square root of 6615232257 is about 81334.0780792406. The cubic root of 6615232257 is about 1877.2193933243.

The spelling of 6615232257 in words is "six billion, six hundred fifteen million, two hundred thirty-two thousand, two hundred fifty-seven".