260063665 has 4 divisors (see below), whose sum is σ = 312076404. Its totient is φ = 208050928.

The previous prime is 260063641. The next prime is 260063717. The reversal of 260063665 is 566360062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566360062 = 2 ⋅283180031.

It can be written as a sum of positive squares in 2 ways, for example, as 123454321 + 136609344 = 11111^2 + 11688^2 .

It is a cyclic number.

It is not a de Polignac number, because 260063665 - 2⁷ = 260063537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 260063665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26006362 + ... + 26006371.

It is an arithmetic number, because the mean of its divisors is an integer number (78019101).

Almost surely, 2^260063665 is an apocalyptic number.

It is an amenable number.

260063665 is a deficient number, since it is larger than the sum of its proper divisors (52012739).

260063665 is an equidigital number, since it uses as much as digits as its factorization.

260063665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52012738.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 260063665 is about 16126.4895436050. The cubic root of 260063665 is about 638.3025207801.

The spelling of 260063665 in words is "two hundred sixty million, sixty-three thousand, six hundred sixty-five".