85166709 has 8 divisors (see below), whose sum is σ = 114150912. Its totient is φ = 56480160.

The previous prime is 85166693. The next prime is 85166713. The reversal of 85166709 is 90766158.

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

It is not a de Polignac number, because 85166709 - 2⁴ = 85166693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85166729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73744 + ... + 74889.

It is an arithmetic number, because the mean of its divisors is an integer number (14268864).

Almost surely, 2^85166709 is an apocalyptic number.

It is an amenable number.

85166709 is a deficient number, since it is larger than the sum of its proper divisors (28984203).

85166709 is a wasteful number, since it uses less digits than its factorization.

85166709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148827.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 85166709 is about 9228.5810935376. The cubic root of 85166709 is about 439.9702269799.

It can be divided in two parts, 8516 and 6709, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 85166709 in words is "eighty-five million, one hundred sixty-six thousand, seven hundred nine".