85666719 has 4 divisors (see below), whose sum is σ = 114222296. Its totient is φ = 57111144.

The previous prime is 85666703. The next prime is 85666739. The reversal of 85666719 is 91766658.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85666719 - 2⁴ = 85666703 is a prime.

It is a super-3 number, since 3×85666719³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85666739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14277784 + ... + 14277789.

It is an arithmetic number, because the mean of its divisors is an integer number (28555574).

Almost surely, 2^85666719 is an apocalyptic number.

85666719 is a deficient number, since it is larger than the sum of its proper divisors (28555577).

85666719 is a wasteful number, since it uses less digits than its factorization.

85666719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28555576.

The product of its digits is 544320, while the sum is 48.

The square root of 85666719 is about 9255.6317450512. The cubic root of 85666719 is about 440.8295627393.

The spelling of 85666719 in words is "eighty-five million, six hundred sixty-six thousand, seven hundred nineteen".