85866666 has 32 divisors (see below), whose sum is σ = 175322880. Its totient is φ = 28030464.

The previous prime is 85866629. The next prime is 85866667. The reversal of 85866666 is 66666858.

85866666 is a modest number, since divided by 66666 gives 858 as remainder.

It is not an unprimeable number, because it can be changed into a prime (85866667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59631 + ... + 61053.

It is an arithmetic number, because the mean of its divisors is an integer number (5478840).

Almost surely, 2^85866666 is an apocalyptic number.

85866666 is an abundant number, since it is smaller than the sum of its proper divisors (89456214).

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

85866666 is a wasteful number, since it uses less digits than its factorization.

85866666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630.

The product of its digits is 2488320, while the sum is 51.

The square root of 85866666 is about 9266.4268194380. The cubic root of 85866666 is about 441.1722631609.

The spelling of 85866666 in words is "eighty-five million, eight hundred sixty-six thousand, six hundred sixty-six".