6645830 has 8 divisors (see below), whose sum is σ = 11962512. Its totient is φ = 2658328.

The previous prime is 6645823. The next prime is 6645833. The reversal of 6645830 is 385466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645833) 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, 332282 + ... + 332301.

It is an arithmetic number, because the mean of its divisors is an integer number (1495314).

Almost surely, 2^6645830 is an apocalyptic number.

6645830 is a deficient number, since it is larger than the sum of its proper divisors (5316682).

6645830 is a wasteful number, since it uses less digits than its factorization.

6645830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664590.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6645830 is about 2577.9507365347. The cubic root of 6645830 is about 188.0109205970.

The spelling of 6645830 in words is "six million, six hundred forty-five thousand, eight hundred thirty".