260608657 has 4 divisors (see below), whose sum is σ = 275938596. Its totient is φ = 245278720.

The previous prime is 260608637. The next prime is 260608709. The reversal of 260608657 is 756806062.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144744961 + 115863696 = 12031^2 + 10764^2 .

It is a de Polignac number, because none of the positive numbers 2^k-260608657 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260608637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7664944 + ... + 7664977.

It is an arithmetic number, because the mean of its divisors is an integer number (68984649).

Almost surely, 2^260608657 is an apocalyptic number.

It is an amenable number.

260608657 is a deficient number, since it is larger than the sum of its proper divisors (15329939).

260608657 is a wasteful number, since it uses less digits than its factorization.

260608657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15329938.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 260608657 is about 16143.3781161193. The cubic root of 260608657 is about 638.7480873816.

The spelling of 260608657 in words is "two hundred sixty million, six hundred eight thousand, six hundred fifty-seven".