2659664 has 20 divisors (see below), whose sum is σ = 5889504. Its totient is φ = 1139808.

The previous prime is 2659663. The next prime is 2659673. The reversal of 2659664 is 4669562.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2659663) 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, 11762 + ... + 11985.

2^2659664 is an apocalyptic number.

It is an amenable number.

2659664 is an abundant number, since it is smaller than the sum of its proper divisors (3229840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2659664 is a wasteful number, since it uses less digits than its factorization.

2659664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23762 (or 23756 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 2659664 is about 1630.8476323679. The cubic root of 2659664 is about 138.5507640159.

The spelling of 2659664 in words is "two million, six hundred fifty-nine thousand, six hundred sixty-four".