2664609 has 4 divisors (see below), whose sum is σ = 3552816. Its totient is φ = 1776404.

The previous prime is 2664601. The next prime is 2664643. The reversal of 2664609 is 9064662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2664609 - 2³ = 2664601 is a prime.

It is a super-2 number, since 2×2664609² = 14200282245762, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2664609.

It is not an unprimeable number, because it can be changed into a prime (2664601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444099 + ... + 444104.

It is an arithmetic number, because the mean of its divisors is an integer number (888204).

2^2664609 is an apocalyptic number.

It is an amenable number.

2664609 is a deficient number, since it is larger than the sum of its proper divisors (888207).

2664609 is an equidigital number, since it uses as much as digits as its factorization.

2664609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888206.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 2664609 is about 1632.3630110977. The cubic root of 2664609 is about 138.6365780326.

The spelling of 2664609 in words is "two million, six hundred sixty-four thousand, six hundred nine".