260009661 has 16 divisors (see below), whose sum is σ = 365373440. Its totient is φ = 164015280.

The previous prime is 260009657. The next prime is 260009669. The reversal of 260009661 is 166900062.

It is not a de Polignac number, because 260009661 - 2² = 260009657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260009669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54186 + ... + 58788.

It is an arithmetic number, because the mean of its divisors is an integer number (22835840).

Almost surely, 2^260009661 is an apocalyptic number.

It is an amenable number.

260009661 is a deficient number, since it is larger than the sum of its proper divisors (105363779).

260009661 is a wasteful number, since it uses less digits than its factorization.

260009661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 260009661 is about 16124.8150687070. The cubic root of 260009661 is about 638.2583350924.

The spelling of 260009661 in words is "two hundred sixty million, nine thousand, six hundred sixty-one".