2500664 has 8 divisors (see below), whose sum is σ = 4688760. Its totient is φ = 1250328.

The previous prime is 2500651. The next prime is 2500669. The reversal of 2500664 is 4660052.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156284 + ... + 156299.

It is an arithmetic number, because the mean of its divisors is an integer number (586095).

2^2500664 is an apocalyptic number.

It is an amenable number.

2500664 is a deficient number, since it is larger than the sum of its proper divisors (2188096).

2500664 is a wasteful number, since it uses less digits than its factorization.

2500664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312589 (or 312585 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2500664 is about 1581.3487913803. The cubic root of 2500664 is about 135.7328955881.

The spelling of 2500664 in words is "two million, five hundred thousand, six hundred sixty-four".