3664255725 has 120 divisors (see below), whose sum is σ = 7382418120. Its totient is φ = 1785991680.

The previous prime is 3664255723. The next prime is 3664255739. The reversal of 3664255725 is 5275524663.

3664255725 is a `hidden beast` number, since 36 + 6 + 42 + 5 + 572 + 5 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 997359561 + 2666896164 = 31581^2 + 51642^2 .

It is not a de Polignac number, because 3664255725 - 2¹ = 3664255723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3664255723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2868787 + ... + 2870063.

It is an arithmetic number, because the mean of its divisors is an integer number (61520151).

Almost surely, 2^3664255725 is an apocalyptic number.

It is an amenable number.

3664255725 is an abundant number, since it is smaller than the sum of its proper divisors (3718162395).

3664255725 is a wasteful number, since it uses less digits than its factorization.

3664255725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421 (or 1407 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 45.

The square root of 3664255725 is about 60533.0961127878. The cubic root of 3664255725 is about 1541.6836206885.

The spelling of 3664255725 in words is "three billion, six hundred sixty-four million, two hundred fifty-five thousand, seven hundred twenty-five".