2651664 has 20 divisors (see below), whose sum is σ = 6850256. Its totient is φ = 883872.

The previous prime is 2651651. The next prime is 2651669. The reversal of 2651664 is 4661562.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2651669) 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, 27574 + ... + 27669.

2^2651664 is an apocalyptic number.

2651664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2651664 is an abundant number, since it is smaller than the sum of its proper divisors (4198592).

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

2651664 is a wasteful number, since it uses less digits than its factorization.

2651664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55254 (or 55248 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 2651664 is about 1628.3930729403. The cubic root of 2651664 is about 138.4117089451.

The spelling of 2651664 in words is "two million, six hundred fifty-one thousand, six hundred sixty-four".