85891766 has 4 divisors (see below), whose sum is σ = 128837652. Its totient is φ = 42945882.

The previous prime is 85891759. The next prime is 85891781. The reversal of 85891766 is 66719858.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21472940 + ... + 21472943.

It is an arithmetic number, because the mean of its divisors is an integer number (32209413).

Almost surely, 2^85891766 is an apocalyptic number.

85891766 is a deficient number, since it is larger than the sum of its proper divisors (42945886).

85891766 is a wasteful number, since it uses less digits than its factorization.

85891766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42945885.

The product of its digits is 725760, while the sum is 50.

The square root of 85891766 is about 9267.7810720798. The cubic root of 85891766 is about 441.2152458670.

The spelling of 85891766 in words is "eighty-five million, eight hundred ninety-one thousand, seven hundred sixty-six".