66870067 has 4 divisors (see below), whose sum is σ = 72949176. Its totient is φ = 60790960.

The previous prime is 66870059. The next prime is 66870073. The reversal of 66870067 is 76007866.

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 66870067 - 2³ = 66870059 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66870017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3039538 + ... + 3039559.

It is an arithmetic number, because the mean of its divisors is an integer number (18237294).

Almost surely, 2^66870067 is an apocalyptic number.

66870067 is a deficient number, since it is larger than the sum of its proper divisors (6079109).

66870067 is a wasteful number, since it uses less digits than its factorization.

66870067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6079108.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 66870067 is about 8177.4119989151. The cubic root of 66870067 is about 405.8920883337.

The spelling of 66870067 in words is "sixty-six million, eight hundred seventy thousand, sixty-seven".