85668638 has 8 divisors (see below), whose sum is σ = 140185080. Its totient is φ = 38940280.

The previous prime is 85668613. The next prime is 85668673. The reversal of 85668638 is 83686658.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946993 + ... + 1947036.

It is an arithmetic number, because the mean of its divisors is an integer number (17523135).

Almost surely, 2^85668638 is an apocalyptic number.

85668638 is a deficient number, since it is larger than the sum of its proper divisors (54516442).

85668638 is a wasteful number, since it uses less digits than its factorization.

85668638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894042.

The product of its digits is 1658880, while the sum is 50.

The square root of 85668638 is about 9255.7354110843. The cubic root of 85668638 is about 440.8328543545.

The spelling of 85668638 in words is "eighty-five million, six hundred sixty-eight thousand, six hundred thirty-eight".