3257357665 has 16 divisors (see below), whose sum is σ = 3952022400. Its totient is φ = 2577173760.

The previous prime is 3257357651. The next prime is 3257357671. The reversal of 3257357665 is 5667537523.

It is not a de Polignac number, because 3257357665 - 2¹⁷ = 3257226593 is a prime.

It is a super-2 number, since 2×3257357665² = 21220757915468504450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332761 + ... + 342409.

It is an arithmetic number, because the mean of its divisors is an integer number (247001400).

Almost surely, 2^3257357665 is an apocalyptic number.

It is an amenable number.

3257357665 is a deficient number, since it is larger than the sum of its proper divisors (694664735).

3257357665 is a wasteful number, since it uses less digits than its factorization.

3257357665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10392.

The product of its digits is 3969000, while the sum is 49.

The square root of 3257357665 is about 57073.2657642788. The cubic root of 3257357665 is about 1482.3649893591.

The spelling of 3257357665 in words is "three billion, two hundred fifty-seven million, three hundred fifty-seven thousand, six hundred sixty-five".