85665202678 has 16 divisors (see below), whose sum is σ = 140238087696. Its totient is φ = 38922432640.

The previous prime is 85665202669. The next prime is 85665202681. The reversal of 85665202678 is 87620256658.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760951 + ... + 866242.

It is an arithmetic number, because the mean of its divisors is an integer number (8764880481).

Almost surely, 2^85665202678 is an apocalyptic number.

85665202678 is a deficient number, since it is larger than the sum of its proper divisors (54572885018).

85665202678 is a wasteful number, since it uses less digits than its factorization.

85665202678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629599.

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 85665202678 in words is "eighty-five billion, six hundred sixty-five million, two hundred two thousand, six hundred seventy-eight".