66700734067 has 4 divisors (see below), whose sum is σ = 72764437176. Its totient is φ = 60637030960.

The previous prime is 66700734059. The next prime is 66700734143. The reversal of 66700734067 is 76043700766.

It is a happy number.

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

It is not a de Polignac number, because 66700734067 - 2³ = 66700734059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66700734767) 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, 3031851538 + ... + 3031851559.

It is an arithmetic number, because the mean of its divisors is an integer number (18191109294).

Almost surely, 2^66700734067 is an apocalyptic number.

66700734067 is a deficient number, since it is larger than the sum of its proper divisors (6063703109).

66700734067 is a wasteful number, since it uses less digits than its factorization.

66700734067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6063703108.

The product of its (nonzero) digits is 889056, while the sum is 46.

The spelling of 66700734067 in words is "sixty-six billion, seven hundred million, seven hundred thirty-four thousand, sixty-seven".