2690808669 has 12 divisors (see below), whose sum is σ = 3891787900. Its totient is φ = 1791535104.

The previous prime is 2690808667. The next prime is 2690808697. The reversal of 2690808669 is 9668080962.

2690808669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1852011225 + 838797444 = 43035^2 + 28962^2 .

It is not a de Polignac number, because 2690808669 - 2¹ = 2690808667 is a prime.

It is a super-2 number, since 2×2690808669² = 14480902586331103122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2690808667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187474 + ... + 201315.

Almost surely, 2^2690808669 is an apocalyptic number.

It is an amenable number.

2690808669 is a deficient number, since it is larger than the sum of its proper divisors (1200979231).

2690808669 is a wasteful number, since it uses less digits than its factorization.

2690808669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389564 (or 389561 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The square root of 2690808669 is about 51873.0052050197. The cubic root of 2690808669 is about 1390.8947655848.

The spelling of 2690808669 in words is "two billion, six hundred ninety million, eight hundred eight thousand, six hundred sixty-nine".