85663878 has 8 divisors (see below), whose sum is σ = 171327768. Its totient is φ = 28554624.

The previous prime is 85663873. The next prime is 85663933. The reversal of 85663878 is 87836658.

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

85663878 is an admirable number.

It is a super-3 number, since 3×85663878³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85663878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85663871) 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, 7138651 + ... + 7138662.

It is an arithmetic number, because the mean of its divisors is an integer number (21415971).

Almost surely, 2^85663878 is an apocalyptic number.

85663878 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

85663878 is a wasteful number, since it uses less digits than its factorization.

85663878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14277318.

The product of its digits is 1935360, while the sum is 51.

The square root of 85663878 is about 9255.4782696520. The cubic root of 85663878 is about 440.8246895492.

The spelling of 85663878 in words is "eighty-five million, six hundred sixty-three thousand, eight hundred seventy-eight".