66701040036667 has 4 divisors (see below), whose sum is σ = 66740299037800. Its totient is φ = 66661781035536.

The previous prime is 66701040036641. The next prime is 66701040036677. The reversal of 66701040036667 is 76663004010766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66701040036667 - 2¹⁹ = 66701039512379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66701040036607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19629498018 + ... + 19629501415.

It is an arithmetic number, because the mean of its divisors is an integer number (16685074759450).

Almost surely, 2^{66701040036667} is an apocalyptic number.

66701040036667 is a deficient number, since it is larger than the sum of its proper divisors (39259001133).

66701040036667 is a wasteful number, since it uses less digits than its factorization.

66701040036667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39259001132.

The product of its (nonzero) digits is 4572288, while the sum is 52.

The spelling of 66701040036667 in words is "sixty-six trillion, seven hundred one billion, forty million, thirty-six thousand, six hundred sixty-seven".