6689255 has 4 divisors (see below), whose sum is σ = 8027112. Its totient is φ = 5351400.

The previous prime is 6689239. The next prime is 6689257. The reversal of 6689255 is 5529866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5529866 = 2 ⋅2764933.

It is not a de Polignac number, because 6689255 - 2⁴ = 6689239 is a prime.

It is a super-2 number, since 2×6689255² = 89492264910050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6689257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668921 + ... + 668930.

It is an arithmetic number, because the mean of its divisors is an integer number (2006778).

Almost surely, 2^6689255 is an apocalyptic number.

6689255 is a deficient number, since it is larger than the sum of its proper divisors (1337857).

6689255 is a wasteful number, since it uses less digits than its factorization.

6689255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337856.

The product of its digits is 129600, while the sum is 41.

The square root of 6689255 is about 2586.3594104455. The cubic root of 6689255 is about 188.4195305084.

The spelling of 6689255 in words is "six million, six hundred eighty-nine thousand, two hundred fifty-five".