85591166366 has 4 divisors (see below), whose sum is σ = 128386749552. Its totient is φ = 42795583182.

The previous prime is 85591166359. The next prime is 85591166387. The reversal of 85591166366 is 66366119558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66366119558 = 2 ⋅33183059779.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21397791590 + ... + 21397791593.

It is an arithmetic number, because the mean of its divisors is an integer number (32096687388).

Almost surely, 2^85591166366 is an apocalyptic number.

85591166366 is a deficient number, since it is larger than the sum of its proper divisors (42795583186).

85591166366 is a wasteful number, since it uses less digits than its factorization.

85591166366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42795583185.

The product of its digits is 6998400, while the sum is 56.

The spelling of 85591166366 in words is "eighty-five billion, five hundred ninety-one million, one hundred sixty-six thousand, three hundred sixty-six".