2580664 has 8 divisors (see below), whose sum is σ = 4838760. Its totient is φ = 1290328.

The previous prime is 2580661. The next prime is 2580667. The reversal of 2580664 is 4660852.

It is an interprime number because it is at equal distance from previous prime (2580661) and next prime (2580667).

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 (2580661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161284 + ... + 161299.

It is an arithmetic number, because the mean of its divisors is an integer number (604845).

2^2580664 is an apocalyptic number.

It is an amenable number.

2580664 is a deficient number, since it is larger than the sum of its proper divisors (2258096).

2580664 is a wasteful number, since it uses less digits than its factorization.

2580664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322589 (or 322585 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2580664 is about 1606.4445212954. Note that the first 3 decimals coincide. The cubic root of 2580664 is about 137.1651621294.

The spelling of 2580664 in words is "two million, five hundred eighty thousand, six hundred sixty-four".