2660577657 has 32 divisors (see below), whose sum is σ = 3831928320. Its totient is φ = 1636588800.

The previous prime is 2660577649. The next prime is 2660577671. The reversal of 2660577657 is 7567750662.

It is not a de Polignac number, because 2660577657 - 2³ = 2660577649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2660575657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 981498 + ... + 984204.

It is an arithmetic number, because the mean of its divisors is an integer number (119747760).

Almost surely, 2^2660577657 is an apocalyptic number.

It is an amenable number.

2660577657 is a deficient number, since it is larger than the sum of its proper divisors (1171350663).

2660577657 is a wasteful number, since it uses less digits than its factorization.

2660577657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173.

The product of its (nonzero) digits is 3704400, while the sum is 51.

The square root of 2660577657 is about 51580.7876733188. The cubic root of 2660577657 is about 1385.6662734586. Note that the first 3 decimals are identical.

The spelling of 2660577657 in words is "two billion, six hundred sixty million, five hundred seventy-seven thousand, six hundred fifty-seven".