6665655 has 16 divisors (see below), whose sum is σ = 10787040. Its totient is φ = 3514368.

The previous prime is 6665639. The next prime is 6665669. The reversal of 6665655 is 5565666.

It is a happy number.

It is not a de Polignac number, because 6665655 - 2⁴ = 6665639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162 + ... + 3831.

It is an arithmetic number, because the mean of its divisors is an integer number (674190).

Almost surely, 2^6665655 is an apocalyptic number.

6665655 is a deficient number, since it is larger than the sum of its proper divisors (4121385).

6665655 is a wasteful number, since it uses less digits than its factorization.

6665655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5090.

The product of its digits is 162000, while the sum is 39.

The square root of 6665655 is about 2581.7929816312. The cubic root of 6665655 is about 188.1976851468.

The spelling of 6665655 in words is "six million, six hundred sixty-five thousand, six hundred fifty-five".