6349375665 has 24 divisors (see below), whose sum is σ = 11015702568. Its totient is φ = 3383220480.

The previous prime is 6349375651. The next prime is 6349375687. The reversal of 6349375665 is 5665739436.

6349375665 is a `hidden beast` number, since 6 + 3 + 49 + 37 + 566 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4297329 + 6345078336 = 2073^2 + 79656^2 .

It is not a de Polignac number, because 6349375665 - 2²⁷ = 6215157937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14946 + ... + 113675.

It is an arithmetic number, because the mean of its divisors is an integer number (458987607).

Almost surely, 2^6349375665 is an apocalyptic number.

It is an amenable number.

6349375665 is a deficient number, since it is larger than the sum of its proper divisors (4666326903).

6349375665 is a wasteful number, since it uses less digits than its factorization.

6349375665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129729 (or 129726 counting only the distinct ones).

The product of its digits is 12247200, while the sum is 54.

The square root of 6349375665 is about 79682.9697300496. The cubic root of 6349375665 is about 1851.7272074832.

The spelling of 6349375665 in words is "six billion, three hundred forty-nine million, three hundred seventy-five thousand, six hundred sixty-five".