3665552261 has 12 divisors (see below), whose sum is σ = 4266244800. Its totient is φ = 3140255160.

The previous prime is 3665552203. The next prime is 3665552263. The reversal of 3665552261 is 1622555663.

It is a de Polignac number, because none of the positive numbers 2^k-3665552261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665552263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79940 + ... + 117138.

It is an arithmetic number, because the mean of its divisors is an integer number (355520400).

Almost surely, 2^3665552261 is an apocalyptic number.

It is an amenable number.

3665552261 is a deficient number, since it is larger than the sum of its proper divisors (600692539).

3665552261 is a wasteful number, since it uses less digits than its factorization.

3665552261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39224 (or 39217 counting only the distinct ones).

The product of its digits is 324000, while the sum is 41.

The square root of 3665552261 is about 60543.8044807229. The cubic root of 3665552261 is about 1541.8654322903.

The spelling of 3665552261 in words is "three billion, six hundred sixty-five million, five hundred fifty-two thousand, two hundred sixty-one".