260411661 has 48 divisors (see below), whose sum is σ = 413051184. Its totient is φ = 157427712.

The previous prime is 260411653. The next prime is 260411693. The reversal of 260411661 is 166114062.

It can be written as a sum of positive squares in 8 ways, for example, as 69806025 + 190605636 = 8355^2 + 13806^2 .

It is not a de Polignac number, because 260411661 - 2³ = 260411653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260411461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 888631 + ... + 888923.

It is an arithmetic number, because the mean of its divisors is an integer number (8605233).

Almost surely, 2^260411661 is an apocalyptic number.

It is an amenable number.

260411661 is a deficient number, since it is larger than the sum of its proper divisors (152639523).

260411661 is a wasteful number, since it uses less digits than its factorization.

260411661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 507 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 260411661 is about 16137.2755135432. The cubic root of 260411661 is about 638.5871020195.

The spelling of 260411661 in words is "two hundred sixty million, four hundred eleven thousand, six hundred sixty-one".