85766671 has 4 divisors (see below), whose sum is σ = 87172744. Its totient is φ = 84360600.

The previous prime is 85766663. The next prime is 85766687. The reversal of 85766671 is 17666758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17666758 = 2 ⋅8833379.

It is a cyclic number.

It is not a de Polignac number, because 85766671 - 2³ = 85766663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85766621) 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 3 ways as a sum of consecutive naturals, for example, 702945 + ... + 703066.

It is an arithmetic number, because the mean of its divisors is an integer number (21793186).

Almost surely, 2^85766671 is an apocalyptic number.

85766671 is a deficient number, since it is larger than the sum of its proper divisors (1406073).

85766671 is a wasteful number, since it uses less digits than its factorization.

85766671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406072.

The product of its digits is 423360, while the sum is 46.

The square root of 85766671 is about 9261.0296943698. The cubic root of 85766671 is about 441.0009426779. Note that the first 3 decimals are identical.

It can be divided in two parts, 857 and 66671, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 85766671 in words is "eighty-five million, seven hundred sixty-six thousand, six hundred seventy-one".