85660218 has 24 divisors (see below), whose sum is σ = 212111328. Its totient is φ = 24474312.

The previous prime is 85660213. The next prime is 85660219. The reversal of 85660218 is 81206658.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85660213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339796 + ... + 340047.

It is an arithmetic number, because the mean of its divisors is an integer number (8837972).

Almost surely, 2^85660218 is an apocalyptic number.

85660218 is an abundant number, since it is smaller than the sum of its proper divisors (126451110).

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

85660218 is a wasteful number, since it uses less digits than its factorization.

85660218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679858 (or 679855 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 85660218 is about 9255.2805468014. The cubic root of 85660218 is about 440.8184113629.

The spelling of 85660218 in words is "eighty-five million, six hundred sixty thousand, two hundred eighteen".