6366399 has 24 divisors (see below), whose sum is σ = 9530640. Its totient is φ = 3773952.

The previous prime is 6366391. The next prime is 6366419. The reversal of 6366399 is 9936636.

6366399 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6366399 - 2³ = 6366391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6366399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6366391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14487 + ... + 14919.

It is an arithmetic number, because the mean of its divisors is an integer number (397110).

Almost surely, 2^6366399 is an apocalyptic number.

6366399 is a deficient number, since it is larger than the sum of its proper divisors (3164241).

6366399 is a wasteful number, since it uses less digits than its factorization.

6366399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 478 counting only the distinct ones).

The product of its digits is 157464, while the sum is 42.

The square root of 6366399 is about 2523.1724079024. The cubic root of 6366399 is about 185.3380621633.

The spelling of 6366399 in words is "six million, three hundred sixty-six thousand, three hundred ninety-nine".