85801666588 has 12 divisors (see below), whose sum is σ = 163803181752. Its totient is φ = 39000757520.

The previous prime is 85801666579. The next prime is 85801666609. The reversal of 85801666588 is 88566610858.

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, 975018895 + ... + 975018982.

It is an arithmetic number, because the mean of its divisors is an integer number (13650265146).

Almost surely, 2^85801666588 is an apocalyptic number.

It is an amenable number.

85801666588 is a deficient number, since it is larger than the sum of its proper divisors (78001515164).

85801666588 is a wasteful number, since it uses less digits than its factorization.

85801666588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950037892 (or 1950037890 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 61.

The spelling of 85801666588 in words is "eighty-five billion, eight hundred one million, six hundred sixty-six thousand, five hundred eighty-eight".