2630665 has 8 divisors (see below), whose sum is σ = 3342600. Its totient is φ = 1980672.

The previous prime is 2630627. The next prime is 2630681. The reversal of 2630665 is 5660362.

It can be written as a sum of positive squares in 4 ways, for example, as 1247689 + 1382976 = 1117^2 + 1176^2 .

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 2630665 - 2⁹ = 2630153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15390 + ... + 15559.

It is an arithmetic number, because the mean of its divisors is an integer number (417825).

2^2630665 is an apocalyptic number.

It is an amenable number.

2630665 is a deficient number, since it is larger than the sum of its proper divisors (711935).

2630665 is a wasteful number, since it uses less digits than its factorization.

2630665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30971.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 2630665 is about 1621.9324893472. The cubic root of 2630665 is about 138.0453712047.

The spelling of 2630665 in words is "two million, six hundred thirty thousand, six hundred sixty-five".