66680670067 has 16 divisors (see below), whose sum is σ = 76686741504. Its totient is φ = 57415176000.

The previous prime is 66680670053. The next prime is 66680670071. The reversal of 66680670067 is 76007608666.

It is a cyclic number.

It is not a de Polignac number, because 66680670067 - 2¹⁵ = 66680637299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66680669996 and 66680670023.

It is not an unprimeable number, because it can be changed into a prime (66680670037) 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, 2064234 + ... + 2096287.

It is an arithmetic number, because the mean of its divisors is an integer number (4792921344).

Almost surely, 2^66680670067 is an apocalyptic number.

66680670067 is a deficient number, since it is larger than the sum of its proper divisors (10006071437).

66680670067 is a wasteful number, since it uses less digits than its factorization.

66680670067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160610.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 66680670067 in words is "sixty-six billion, six hundred eighty million, six hundred seventy thousand, sixty-seven".