3666625065 has 24 divisors (see below), whose sum is σ = 6475402440. Its totient is φ = 1918635264.

The previous prime is 3666625051. The next prime is 3666625069. The reversal of 3666625065 is 5605266663.

It can be written as a sum of positive squares in 4 ways, for example, as 964288809 + 2702336256 = 31053^2 + 51984^2 .

It is not a de Polignac number, because 3666625065 - 2⁸ = 3666624809 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3666625065.

It is not an unprimeable number, because it can be changed into a prime (3666625069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 766300 + ... + 771069.

It is an arithmetic number, because the mean of its divisors is an integer number (269808435).

Almost surely, 2^3666625065 is an apocalyptic number.

It is an amenable number.

3666625065 is a deficient number, since it is larger than the sum of its proper divisors (2808777375).

3666625065 is a wasteful number, since it uses less digits than its factorization.

3666625065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537433 (or 1537430 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The square root of 3666625065 is about 60552.6635665187. The cubic root of 3666625065 is about 1542.0158378263.

The spelling of 3666625065 in words is "three billion, six hundred sixty-six million, six hundred twenty-five thousand, sixty-five".