85775766 has 36 divisors (see below), whose sum is σ = 181970172. Its totient is φ = 26950968.

The previous prime is 85775759. The next prime is 85775773. The reversal of 85775766 is 66757758.

It is an interprime number because it is at equal distance from previous prime (85775759) and next prime (85775773).

Its product of digits (2469600) is a multiple of the sum of its prime factors (441).

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 430935 + ... + 431133.

It is an arithmetic number, because the mean of its divisors is an integer number (5054727).

Almost surely, 2^85775766 is an apocalyptic number.

85775766 is the 5858-th centered pentagonal number.

85775766 is an abundant number, since it is smaller than the sum of its proper divisors (96194406).

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

85775766 is a wasteful number, since it uses less digits than its factorization.

85775766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 223 counting only the distinct ones).

The product of its digits is 2469600, while the sum is 51.

The square root of 85775766 is about 9261.5207174632. The cubic root of 85775766 is about 441.0165305582.

The spelling of 85775766 in words is "eighty-five million, seven hundred seventy-five thousand, seven hundred sixty-six".