66805067 has 8 divisors (see below), whose sum is σ = 78981600. Its totient is φ = 55286784.

The previous prime is 66805021. The next prime is 66805073. The reversal of 66805067 is 76050866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66805067 - 2¹⁰ = 66804043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66805067.

It is not an unprimeable number, because it can be changed into a prime (66805267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164342 + ... + 164747.

It is an arithmetic number, because the mean of its divisors is an integer number (9872700).

Almost surely, 2^66805067 is an apocalyptic number.

66805067 is a deficient number, since it is larger than the sum of its proper divisors (12176533).

66805067 is a wasteful number, since it uses less digits than its factorization.

66805067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329125.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 66805067 is about 8173.4366700917. The cubic root of 66805067 is about 405.7605320190.

The spelling of 66805067 in words is "sixty-six million, eight hundred five thousand, sixty-seven".