6669855 has 48 divisors (see below), whose sum is σ = 12636000. Its totient is φ = 3241728.

The previous prime is 6669853. The next prime is 6669857. The reversal of 6669855 is 5589666.

It is an interprime number because it is at equal distance from previous prime (6669853) and next prime (6669857).

It is not a de Polignac number, because 6669855 - 2¹ = 6669853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6669855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24661 + ... + 24929.

It is an arithmetic number, because the mean of its divisors is an integer number (263250).

Almost surely, 2^6669855 is an apocalyptic number.

6669855 is a deficient number, since it is larger than the sum of its proper divisors (5966145).

6669855 is a wasteful number, since it uses less digits than its factorization.

6669855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 325 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 6669855 is about 2582.6062417643. The cubic root of 6669855 is about 188.2372043598.

The spelling of 6669855 in words is "six million, six hundred sixty-nine thousand, eight hundred fifty-five".