7885866 has 16 divisors (see below), whose sum is σ = 15811488. Its totient is φ = 2622000.

The previous prime is 7885861. The next prime is 7885879. The reversal of 7885866 is 6685887.

It is a happy number.

It is a d-powerful number, because it can be written as 7⁸ + 8 + 8² + 5⁸ + 8⁴ + 6⁶ + 6⁸ .

It is not an unprimeable number, because it can be changed into a prime (7885861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (988218).

Almost surely, 2^7885866 is an apocalyptic number.

7885866 is an abundant number, since it is smaller than the sum of its proper divisors (7925622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7885866 is a wasteful number, since it uses less digits than its factorization.

7885866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3317.

The product of its digits is 645120, while the sum is 48.

The square root of 7885866 is about 2808.1784131355. The cubic root of 7885866 is about 199.0443240241.

The spelling of 7885866 in words is "seven million, eight hundred eighty-five thousand, eight hundred sixty-six".