3665120265 has 128 divisors (see below), whose sum is σ = 7053742080. Its totient is φ = 1801046016.

The previous prime is 3665120243. The next prime is 3665120293. The reversal of 3665120265 is 5620215663.

It is a happy number.

It is not a de Polignac number, because 3665120265 - 2⁸ = 3665120009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12950814 + ... + 12951096.

It is an arithmetic number, because the mean of its divisors is an integer number (55107360).

Almost surely, 2^3665120265 is an apocalyptic number.

It is an amenable number.

3665120265 is a deficient number, since it is larger than the sum of its proper divisors (3388621815).

3665120265 is a wasteful number, since it uses less digits than its factorization.

3665120265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 3665120265 is about 60540.2367438384. The cubic root of 3665120265 is about 1541.8048588014.

The spelling of 3665120265 in words is "three billion, six hundred sixty-five million, one hundred twenty thousand, two hundred sixty-five".