6663964 has 12 divisors (see below), whose sum is σ = 11793600. Its totient is φ = 3294368.

The previous prime is 6663961. The next prime is 6663971. The reversal of 6663964 is 4693666.

It is a d-powerful number, because it can be written as 6² + 6² + 6⁵ + 3¹¹ + 9⁷ + 6⁸ + 4⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9004 + ... + 9715.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^6663964 is an apocalyptic number.

It is an amenable number.

6663964 is a deficient number, since it is larger than the sum of its proper divisors (5129636).

6663964 is a wasteful number, since it uses less digits than its factorization.

6663964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18812 (or 18810 counting only the distinct ones).

The product of its digits is 139968, while the sum is 40.

The square root of 6663964 is about 2581.4654752679. The cubic root of 6663964 is about 188.1817692715.

The spelling of 6663964 in words is "six million, six hundred sixty-three thousand, nine hundred sixty-four".