260657655 has 16 divisors (see below), whose sum is σ = 431434080. Its totient is φ = 134223488.

The previous prime is 260657653. The next prime is 260657681. The reversal of 260657655 is 556756062.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 260657655 - 2¹ = 260657653 is a prime.

It is a super-2 number, since 2×260657655² = 135884826220198050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260657653) 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 15 ways as a sum of consecutive naturals, for example, 299172 + ... + 300041.

It is an arithmetic number, because the mean of its divisors is an integer number (26964630).

Almost surely, 2^260657655 is an apocalyptic number.

260657655 is a deficient number, since it is larger than the sum of its proper divisors (170776425).

260657655 is a wasteful number, since it uses less digits than its factorization.

260657655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599250.

The product of its (nonzero) digits is 378000, while the sum is 42.

The square root of 260657655 is about 16144.8956329857. The cubic root of 260657655 is about 638.7881160052.

The spelling of 260657655 in words is "two hundred sixty million, six hundred fifty-seven thousand, six hundred fifty-five".