6390669 has 16 divisors (see below), whose sum is σ = 9031680. Its totient is φ = 4008240.

The previous prime is 6390653. The next prime is 6390679. The reversal of 6390669 is 9660936.

It is not a de Polignac number, because 6390669 - 2⁴ = 6390653 is a prime.

It is a super-2 number, since 2×6390669² = 81681300535122, which contains 22 as substring.

It is a Curzon number.

6390669 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10594 + ... + 11180.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

Almost surely, 2^6390669 is an apocalyptic number.

It is an amenable number.

6390669 is a deficient number, since it is larger than the sum of its proper divisors (2641011).

6390669 is a wasteful number, since it uses less digits than its factorization.

6390669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 6390669 is about 2527.9772546445. The cubic root of 6390669 is about 185.5732789049.

The spelling of 6390669 in words is "six million, three hundred ninety thousand, six hundred sixty-nine".