6555655 has 4 divisors (see below), whose sum is σ = 7866792. Its totient is φ = 5244520.

The previous prime is 6555649. The next prime is 6555671. The reversal of 6555655 is 5565556.

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

It is a de Polignac number, because none of the positive numbers 2^k-6555655 is a prime.

It is a super-2 number, since 2×6555655² = 85953224958050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655561 + ... + 655570.

It is an arithmetic number, because the mean of its divisors is an integer number (1966698).

Almost surely, 2^6555655 is an apocalyptic number.

6555655 is a deficient number, since it is larger than the sum of its proper divisors (1311137).

6555655 is a wasteful number, since it uses less digits than its factorization.

6555655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311136.

The product of its digits is 112500, while the sum is 37.

The square root of 6555655 is about 2560.4013357284. The cubic root of 6555655 is about 187.1566932811.

Subtracting from 6555655 its reverse (5565556), we obtain a palindrome (990099).

The spelling of 6555655 in words is "six million, five hundred fifty-five thousand, six hundred fifty-five".