85555660 has 24 divisors (see below), whose sum is σ = 185463936. Its totient is φ = 33118080.

The previous prime is 85555633. The next prime is 85555661. The reversal of 85555660 is 6655558.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85555661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68377 + ... + 69616.

It is an arithmetic number, because the mean of its divisors is an integer number (7727664).

Almost surely, 2^85555660 is an apocalyptic number.

It is an amenable number.

85555660 is an abundant number, since it is smaller than the sum of its proper divisors (99908276).

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

85555660 is a wasteful number, since it uses less digits than its factorization.

85555660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138033 (or 138031 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 85555660 is about 9249.6302628808. The cubic root of 85555660 is about 440.6389820689.

The spelling of 85555660 in words is "eighty-five million, five hundred fifty-five thousand, six hundred sixty".