66380307667 has 4 divisors (see below), whose sum is σ = 66627074880. Its totient is φ = 66133540456.

The previous prime is 66380307607. The next prime is 66380307689. The reversal of 66380307667 is 76670308366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66380307667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66380307607) 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, 123383203 + ... + 123383740.

It is an arithmetic number, because the mean of its divisors is an integer number (16656768720).

Almost surely, 2^66380307667 is an apocalyptic number.

66380307667 is a deficient number, since it is larger than the sum of its proper divisors (246767213).

66380307667 is a wasteful number, since it uses less digits than its factorization.

66380307667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246767212.

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

The spelling of 66380307667 in words is "sixty-six billion, three hundred eighty million, three hundred seven thousand, six hundred sixty-seven".