85810666 has 8 divisors (see below), whose sum is σ = 132868224. Its totient is φ = 41521260.

The previous prime is 85810643. The next prime is 85810687. The reversal of 85810666 is 66601858.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691960 + ... + 692083.

It is an arithmetic number, because the mean of its divisors is an integer number (16608528).

Almost surely, 2^85810666 is an apocalyptic number.

85810666 is a deficient number, since it is larger than the sum of its proper divisors (47057558).

85810666 is a wasteful number, since it uses less digits than its factorization.

85810666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384076.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 85810666 is about 9263.4046656723. The cubic root of 85810666 is about 441.0763352895.

The spelling of 85810666 in words is "eighty-five million, eight hundred ten thousand, six hundred sixty-six".