3665965637 has 2 divisors, whose sum is σ = 3665965638. Its totient is φ = 3665965636.

The previous prime is 3665965579. The next prime is 3665965687. The reversal of 3665965637 is 7365695663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3217839076 + 448126561 = 56726^2 + 21169^2 .

It is a cyclic number.

It is not a de Polignac number, because 3665965637 - 2⁶ = 3665965573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3665965687) 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 as a sum of consecutive naturals, namely, 1832982818 + 1832982819.

It is an arithmetic number, because the mean of its divisors is an integer number (1832982819).

Almost surely, 2^3665965637 is an apocalyptic number.

It is an amenable number.

3665965637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665965637 is an equidigital number, since it uses as much as digits as its factorization.

3665965637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18370800, while the sum is 56.

The square root of 3665965637 is about 60547.2182432851. The cubic root of 3665965637 is about 1541.9233904697.

The spelling of 3665965637 in words is "three billion, six hundred sixty-five million, nine hundred sixty-five thousand, six hundred thirty-seven".