2164664 has 8 divisors (see below), whose sum is σ = 4058760. Its totient is φ = 1082328.

The previous prime is 2164639. The next prime is 2164681. The reversal of 2164664 is 4664612.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135284 + ... + 135299.

It is an arithmetic number, because the mean of its divisors is an integer number (507345).

2^2164664 is an apocalyptic number.

It is an amenable number.

2164664 is a deficient number, since it is larger than the sum of its proper divisors (1894096).

2164664 is a wasteful number, since it uses less digits than its factorization.

2164664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270589 (or 270585 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 2164664 is about 1471.2797150780. The cubic root of 2164664 is about 129.3590541776.

The spelling of 2164664 in words is "two million, one hundred sixty-four thousand, six hundred sixty-four".