66668036685 has 16 divisors (see below), whose sum is σ = 107447466816. Its totient is φ = 35296750208.

The previous prime is 66668036683. The next prime is 66668036707. The reversal of 66668036685 is 58663086666.

66668036685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66668036685 - 2¹ = 66668036683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66668036681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16218879 + ... + 16222988.

It is an arithmetic number, because the mean of its divisors is an integer number (6715466676).

Almost surely, 2^66668036685 is an apocalyptic number.

It is an amenable number.

66668036685 is a deficient number, since it is larger than the sum of its proper divisors (40779430131).

66668036685 is a wasteful number, since it uses less digits than its factorization.

66668036685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32442012.

The product of its (nonzero) digits is 44789760, while the sum is 60.

The spelling of 66668036685 in words is "sixty-six billion, six hundred sixty-eight million, thirty-six thousand, six hundred eighty-five".