2690665 has 8 divisors (see below), whose sum is σ = 3259080. Its totient is φ = 2132352.

The previous prime is 2690663. The next prime is 2690671. The reversal of 2690665 is 5660962.

It can be written as a sum of positive squares in 4 ways, for example, as 389376 + 2301289 = 624^2 + 1517^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2690665 - 2¹ = 2690663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2690665.

It is not an unprimeable number, because it can be changed into a prime (2690663) 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, 1924 + ... + 3013.

It is an arithmetic number, because the mean of its divisors is an integer number (407385).

2^2690665 is an apocalyptic number.

It is an amenable number.

2690665 is a deficient number, since it is larger than the sum of its proper divisors (568415).

2690665 is a wasteful number, since it uses less digits than its factorization.

2690665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 2690665 is about 1640.3246629860. The cubic root of 2690665 is about 139.0870010695.

The spelling of 2690665 in words is "two million, six hundred ninety thousand, six hundred sixty-five".