5645664 has 36 divisors (see below), whose sum is σ = 16055676. Its totient is φ = 1881792.

The previous prime is 5645657. The next prime is 5645671. The reversal of 5645664 is 4665465.

It is a happy number.

5645664 is a `hidden beast` number, since 5 + 645 + 6 + 6 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (5645657) and next prime (5645671).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9514 + ... + 10089.

It is an arithmetic number, because the mean of its divisors is an integer number (445991).

Almost surely, 2^5645664 is an apocalyptic number.

It is an amenable number.

5645664 is an abundant number, since it is smaller than the sum of its proper divisors (10410012).

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

5645664 is a wasteful number, since it uses less digits than its factorization.

5645664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19619 (or 19608 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 5645664 is about 2376.0606052877. The cubic root of 5645664 is about 178.0621758133.

The spelling of 5645664 in words is "five million, six hundred forty-five thousand, six hundred sixty-four".