6640486 has 8 divisors (see below), whose sum is σ = 9976104. Its totient is φ = 3315120.

The previous prime is 6640477. The next prime is 6640493. The reversal of 6640486 is 6840466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×6640486³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660 + ... + 3703.

It is an arithmetic number, because the mean of its divisors is an integer number (1247013).

Almost surely, 2^6640486 is an apocalyptic number.

6640486 is a deficient number, since it is larger than the sum of its proper divisors (3335618).

6640486 is a wasteful number, since it uses less digits than its factorization.

6640486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 6640486 is about 2576.9140459084. The cubic root of 6640486 is about 187.9605130589.

The spelling of 6640486 in words is "six million, six hundred forty thousand, four hundred eighty-six".