6551855 has 4 divisors (see below), whose sum is σ = 7862232. Its totient is φ = 5241480.

The previous prime is 6551843. The next prime is 6551861. The reversal of 6551855 is 5581556.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6551855 - 2⁶ = 6551791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655181 + ... + 655190.

It is an arithmetic number, because the mean of its divisors is an integer number (1965558).

Almost surely, 2^6551855 is an apocalyptic number.

6551855 is a deficient number, since it is larger than the sum of its proper divisors (1310377).

6551855 is a wasteful number, since it uses less digits than its factorization.

6551855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310376.

The product of its digits is 30000, while the sum is 35.

The square root of 6551855 is about 2559.6591569973. The cubic root of 6551855 is about 187.1205243606.

Subtracting from 6551855 its reverse (5581556), we obtain a cube (970299 = 99³).

The spelling of 6551855 in words is "six million, five hundred fifty-one thousand, eight hundred fifty-five".