5260643665 has 8 divisors (see below), whose sum is σ = 6315775488. Its totient is φ = 4206512880.

The previous prime is 5260643627. The next prime is 5260643669. The reversal of 5260643665 is 5663460625.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5260643665 - 2¹⁵ = 5260610897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5260643669) 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, 238647 + ... + 259756.

It is an arithmetic number, because the mean of its divisors is an integer number (789471936).

Almost surely, 2^5260643665 is an apocalyptic number.

It is an amenable number.

5260643665 is a deficient number, since it is larger than the sum of its proper divisors (1055131823).

5260643665 is a wasteful number, since it uses less digits than its factorization.

5260643665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500519.

The product of its (nonzero) digits is 777600, while the sum is 43.

The square root of 5260643665 is about 72530.2948084454. The cubic root of 5260643665 is about 1739.1870585917.

The spelling of 5260643665 in words is "five billion, two hundred sixty million, six hundred forty-three thousand, six hundred sixty-five".