6640376 has 32 divisors (see below), whose sum is σ = 13132800. Its totient is φ = 3141600.

The previous prime is 6640373. The next prime is 6640393. The reversal of 6640376 is 6730466.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27665 + ... + 27903.

It is an arithmetic number, because the mean of its divisors is an integer number (410400).

Almost surely, 2^6640376 is an apocalyptic number.

It is an amenable number.

6640376 is a deficient number, since it is larger than the sum of its proper divisors (6492424).

6640376 is a wasteful number, since it uses less digits than its factorization.

6640376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 6640376 is about 2576.8927024616. The cubic root of 6640376 is about 187.9594751946.

The spelling of 6640376 in words is "six million, six hundred forty thousand, three hundred seventy-six".