260664445 has 24 divisors (see below), whose sum is σ = 325287144. Its totient is φ = 200503296.

The previous prime is 260664413. The next prime is 260664487. The reversal of 260664445 is 544466062.

It can be written as a sum of positive squares in 12 ways, for example, as 50211396 + 210453049 = 7086^2 + 14507^2 .

It is not a de Polignac number, because 260664445 - 2⁵ = 260664413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 773317 + ... + 773653.

It is an arithmetic number, because the mean of its divisors is an integer number (13553631).

Almost surely, 2^260664445 is an apocalyptic number.

It is an amenable number.

260664445 is a deficient number, since it is larger than the sum of its proper divisors (64622699).

260664445 is a wasteful number, since it uses less digits than its factorization.

260664445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 260664445 is about 16145.1059147966. The cubic root of 260664445 is about 638.7936626595.

The spelling of 260664445 in words is "two hundred sixty million, six hundred sixty-four thousand, four hundred forty-five".