2620664 has 8 divisors (see below), whose sum is σ = 4913760. Its totient is φ = 1310328.

The previous prime is 2620663. The next prime is 2620741. The reversal of 2620664 is 4660262.

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 (2620661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163784 + ... + 163799.

It is an arithmetic number, because the mean of its divisors is an integer number (614220).

2^2620664 is an apocalyptic number.

It is an amenable number.

2620664 is a deficient number, since it is larger than the sum of its proper divisors (2293096).

2620664 is a wasteful number, since it uses less digits than its factorization.

2620664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327589 (or 327585 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 2620664 is about 1618.8465029150. The cubic root of 2620664 is about 137.8702133398.

The spelling of 2620664 in words is "two million, six hundred twenty thousand, six hundred sixty-four".