6640324 has 12 divisors (see below), whose sum is σ = 11995648. Its totient is φ = 3213000.

The previous prime is 6640321. The next prime is 6640327. The reversal of 6640324 is 4230466.

It is an interprime number because it is at equal distance from previous prime (6640321) and next prime (6640327).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6640321) 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, 26652 + ... + 26899.

Almost surely, 2^6640324 is an apocalyptic number.

It is an amenable number.

6640324 is a deficient number, since it is larger than the sum of its proper divisors (5355324).

6640324 is a wasteful number, since it uses less digits than its factorization.

6640324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53586 (or 53584 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 6640324 is about 2576.8826127707. The cubic root of 6640324 is about 187.9589845638.

The spelling of 6640324 in words is "six million, six hundred forty thousand, three hundred twenty-four".