66011285686 has 16 divisors (see below), whose sum is σ = 105260315760. Its totient is φ = 30958912800.

The previous prime is 66011285609. The next prime is 66011285689. The reversal of 66011285686 is 68658211066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011285689) by changing a digit.

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, 8595861 + ... + 8603536.

It is an arithmetic number, because the mean of its divisors is an integer number (6578769735).

Almost surely, 2^66011285686 is an apocalyptic number.

66011285686 is a deficient number, since it is larger than the sum of its proper divisors (39249030074).

66011285686 is a wasteful number, since it uses less digits than its factorization.

66011285686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17199519.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 66011285686 in words is "sixty-six billion, eleven million, two hundred eighty-five thousand, six hundred eighty-six".