6555399 has 12 divisors (see below), whose sum is σ = 9226296. Its totient is φ = 4139568.

The previous prime is 6555397. The next prime is 6555403. The reversal of 6555399 is 9935556.

It is not a de Polignac number, because 6555399 - 2¹ = 6555397 is a prime.

Its product of digits (182250) is a multiple of the sum of its prime divisors (6075).

It is a self number, because there is not a number n which added to its sum of digits gives 6555399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1944 + ... + 4109.

It is an arithmetic number, because the mean of its divisors is an integer number (768858).

Almost surely, 2^6555399 is an apocalyptic number.

6555399 is a deficient number, since it is larger than the sum of its proper divisors (2670897).

6555399 is a wasteful number, since it uses less digits than its factorization.

6555399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6094 (or 6075 counting only the distinct ones).

The product of its digits is 182250, while the sum is 42.

The square root of 6555399 is about 2560.3513430777. The cubic root of 6555399 is about 187.1542570772.

The spelling of 6555399 in words is "six million, five hundred fifty-five thousand, three hundred ninety-nine".