6636664 has 16 divisors (see below), whose sum is σ = 13176000. Its totient is φ = 3123072.

The previous prime is 6636661. The next prime is 6636667. The reversal of 6636664 is 4666366.

It is an interprime number because it is at equal distance from previous prime (6636661) and next prime (6636667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6636661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24264 + ... + 24535.

It is an arithmetic number, because the mean of its divisors is an integer number (823500).

Almost surely, 2^6636664 is an apocalyptic number.

It is an amenable number.

6636664 is a deficient number, since it is larger than the sum of its proper divisors (6539336).

6636664 is a wasteful number, since it uses less digits than its factorization.

6636664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48822 (or 48818 counting only the distinct ones).

The product of its digits is 93312, while the sum is 37.

The square root of 6636664 is about 2576.1723544825. The cubic root of 6636664 is about 187.9244452696.

It can be divided in two parts, 66366 and 64, that multiplied together give a palindrome (4247424).

The spelling of 6636664 in words is "six million, six hundred thirty-six thousand, six hundred sixty-four".