6655865 has 8 divisors (see below), whose sum is σ = 8077320. Its totient is φ = 5264512.

The previous prime is 6655837. The next prime is 6655879. The reversal of 6655865 is 5685566.

It can be written as a sum of positive squares in 4 ways, for example, as 4624 + 6651241 = 68^2 + 2579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6655865 - 2⁶ = 6655801 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7034 + ... + 7923.

It is an arithmetic number, because the mean of its divisors is an integer number (1009665).

Almost surely, 2^6655865 is an apocalyptic number.

It is an amenable number.

6655865 is a deficient number, since it is larger than the sum of its proper divisors (1421455).

6655865 is a wasteful number, since it uses less digits than its factorization.

6655865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15051.

The product of its digits is 216000, while the sum is 41.

The square root of 6655865 is about 2579.8963157460. The cubic root of 6655865 is about 188.1055032535.

Subtracting from 6655865 its reverse (5685566), we obtain a cube (970299 = 99³).

It can be divided in two parts, 6655 and 865, that multiplied together give a palindrome (5756575).

The spelling of 6655865 in words is "six million, six hundred fifty-five thousand, eight hundred sixty-five".