6640774 has 12 divisors (see below), whose sum is σ = 11587644. Its totient is φ = 2846004.

The previous prime is 6640769. The next prime is 6640793. The reversal of 6640774 is 4770466.

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, 33784 + ... + 33979.

It is an arithmetic number, because the mean of its divisors is an integer number (965637).

Almost surely, 2^6640774 is an apocalyptic number.

6640774 is a deficient number, since it is larger than the sum of its proper divisors (4946870).

6640774 is a wasteful number, since it uses less digits than its factorization.

6640774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67779 (or 67772 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 6640774 is about 2576.9699260954. The cubic root of 6640774 is about 187.9632303221.

The spelling of 6640774 in words is "six million, six hundred forty thousand, seven hundred seventy-four".