260776666 has 16 divisors (see below), whose sum is σ = 402967656. Its totient is φ = 126475776.

The previous prime is 260776661. The next prime is 260776699. The reversal of 260776666 is 666677062.

It can be written as a sum of positive squares in 4 ways, for example, as 260144641 + 632025 = 16129^2 + 795^2 .

It is not an unprimeable number, because it can be changed into a prime (260776661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19710 + ... + 30166.

Almost surely, 2^260776666 is an apocalyptic number.

260776666 is a deficient number, since it is larger than the sum of its proper divisors (142190990).

260776666 is a wasteful number, since it uses less digits than its factorization.

260776666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10833.

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 260776666 is about 16148.5809283664. The cubic root of 260776666 is about 638.8853204466.

The spelling of 260776666 in words is "two hundred sixty million, seven hundred seventy-six thousand, six hundred sixty-six".