85665535670 has 32 divisors (see below), whose sum is σ = 181155653280. Its totient is φ = 28754864640.

The previous prime is 85665535663. The next prime is 85665535759. The reversal of 85665535670 is 7653556658.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29951555 + ... + 29954414.

It is an arithmetic number, because the mean of its divisors is an integer number (5661114165).

Almost surely, 2^85665535670 is an apocalyptic number.

85665535670 is an abundant number, since it is smaller than the sum of its proper divisors (95490117610).

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

85665535670 is a wasteful number, since it uses less digits than its factorization.

85665535670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59906000.

The product of its (nonzero) digits is 22680000, while the sum is 56.

The spelling of 85665535670 in words is "eighty-five billion, six hundred sixty-five million, five hundred thirty-five thousand, six hundred seventy".