2660581365 has 48 divisors (see below), whose sum is σ = 4768657920. Its totient is φ = 1264623360.

The previous prime is 2660581349. The next prime is 2660581409. The reversal of 2660581365 is 5631850662.

It is a happy number.

It is not a de Polignac number, because 2660581365 - 2⁴ = 2660581349 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55420 + ... + 91610.

It is an arithmetic number, because the mean of its divisors is an integer number (99347040).

Almost surely, 2^2660581365 is an apocalyptic number.

It is an amenable number.

2660581365 is a deficient number, since it is larger than the sum of its proper divisors (2108076555).

2660581365 is a wasteful number, since it uses less digits than its factorization.

2660581365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36254 (or 36241 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 2660581365 is about 51580.8236169218. The cubic root of 2660581365 is about 1385.6669171845. Note that the first 3 decimals are identical.

The spelling of 2660581365 in words is "two billion, six hundred sixty million, five hundred eighty-one thousand, three hundred sixty-five".