2620669885 has 4 divisors (see below), whose sum is σ = 3144803868. Its totient is φ = 2096535904.

The previous prime is 2620669871. The next prime is 2620669907. The reversal of 2620669885 is 5889660262.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1314642564 + 1306027321 = 36258^2 + 36139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2620669885 is a prime.

It is a super-2 number, since 2×2620669885² = 13735821292291826450, which contains 22 as substring.

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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262066984 + ... + 262066993.

It is an arithmetic number, because the mean of its divisors is an integer number (786200967).

Almost surely, 2^2620669885 is an apocalyptic number.

It is an amenable number.

2620669885 is a deficient number, since it is larger than the sum of its proper divisors (524133983).

2620669885 is an equidigital number, since it uses as much as digits as its factorization.

2620669885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524133982.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The square root of 2620669885 is about 51192.4787932759. The cubic root of 2620669885 is about 1378.7031654085.

The spelling of 2620669885 in words is "two billion, six hundred twenty million, six hundred sixty-nine thousand, eight hundred eighty-five".