85170666 has 16 divisors (see below), whose sum is σ = 194675904. Its totient is φ = 24334464.

The previous prime is 85170661. The next prime is 85170691. The reversal of 85170666 is 66607158.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85170661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1013895 + ... + 1013978.

It is an arithmetic number, because the mean of its divisors is an integer number (12167244).

Almost surely, 2^85170666 is an apocalyptic number.

85170666 is an abundant number, since it is smaller than the sum of its proper divisors (109505238).

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

85170666 is a wasteful number, since it uses less digits than its factorization.

85170666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027885.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 85170666 is about 9228.7954793678. The cubic root of 85170666 is about 439.9770408130.

It can be divided in two parts, 851 and 70666, that added together give a palindrome (71517).

The spelling of 85170666 in words is "eighty-five million, one hundred seventy thousand, six hundred sixty-six".