85507866 has 32 divisors (see below), whose sum is σ = 200020800. Its totient is φ = 27002160.

The previous prime is 85507853. The next prime is 85507871. The reversal of 85507866 is 66870558.

85507866 is a `hidden beast` number, since 85 + 507 + 8 + 66 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40645 + ... + 42696.

It is an arithmetic number, because the mean of its divisors is an integer number (6250650).

Almost surely, 2^85507866 is an apocalyptic number.

85507866 is an abundant number, since it is smaller than the sum of its proper divisors (114512934).

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

85507866 is a wasteful number, since it uses less digits than its factorization.

85507866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83371 (or 83365 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 85507866 is about 9247.0463392372. The cubic root of 85507866 is about 440.5569153290.

The spelling of 85507866 in words is "eighty-five million, five hundred seven thousand, eight hundred sixty-six".