3665959825 has 12 divisors (see below), whose sum is σ = 4959044208. Its totient is φ = 2666152400.

The previous prime is 3665959819. The next prime is 3665959859. The reversal of 3665959825 is 5289595663.

It is a happy number.

It is not a de Polignac number, because 3665959825 - 2²¹ = 3663862673 is a prime.

It is a super-2 number, since 2×3665959825² = 26878522877028061250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3665959825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6665107 + ... + 6665656.

It is an arithmetic number, because the mean of its divisors is an integer number (413253684).

Almost surely, 2^3665959825 is an apocalyptic number.

It is an amenable number.

3665959825 is a deficient number, since it is larger than the sum of its proper divisors (1293084383).

3665959825 is a wasteful number, since it uses less digits than its factorization.

3665959825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13330784 (or 13330779 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 58.

The square root of 3665959825 is about 60547.1702476672. The cubic root of 3665959825 is about 1541.9225756172.

The spelling of 3665959825 in words is "three billion, six hundred sixty-five million, nine hundred fifty-nine thousand, eight hundred twenty-five".