2690912665 has 12 divisors (see below), whose sum is σ = 3756294756. Its totient is φ = 1845197088.

The previous prime is 2690912663. The next prime is 2690912683. The reversal of 2690912665 is 5662190962.

It can be written as a sum of positive squares in 2 ways, for example, as 1191906576 + 1499006089 = 34524^2 + 38717^2 .

It is not a de Polignac number, because 2690912665 - 2¹ = 2690912663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2690912663) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5491414 + ... + 5491903.

It is an arithmetic number, because the mean of its divisors is an integer number (313024563).

Almost surely, 2^2690912665 is an apocalyptic number.

It is an amenable number.

2690912665 is a deficient number, since it is larger than the sum of its proper divisors (1065382091).

2690912665 is a wasteful number, since it uses less digits than its factorization.

2690912665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10983336 (or 10983329 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 2690912665 is about 51874.0076049653. The cubic root of 2690912665 is about 1390.9126840678.

The spelling of 2690912665 in words is "two billion, six hundred ninety million, nine hundred twelve thousand, six hundred sixty-five".