66634755743666 has 16 divisors (see below), whose sum is σ = 109039940196768. Its totient is φ = 30288178399200.

The previous prime is 66634755743629. The next prime is 66634755743681.

66634755743666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66634755743593 and 66634755743602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15377675 + ... + 19228686.

It is an arithmetic number, because the mean of its divisors is an integer number (6814996262298).

Almost surely, 2^{66634755743666} is an apocalyptic number.

66634755743666 is a deficient number, since it is larger than the sum of its proper divisors (42405184453102).

66634755743666 is a wasteful number, since it uses less digits than its factorization.

66634755743666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34693897.

The product of its digits is 8230118400, while the sum is 74.

The spelling of 66634755743666 in words is "sixty-six trillion, six hundred thirty-four billion, seven hundred fifty-five million, seven hundred forty-three thousand, six hundred sixty-six".