66912067 has 8 divisors (see below), whose sum is σ = 68473152. Its totient is φ = 65356800.

The previous prime is 66912031. The next prime is 66912089. The reversal of 66912067 is 76021966.

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

It is a cyclic number.

It is not a de Polignac number, because 66912067 - 2¹⁹ = 66387779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66916067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29017 + ... + 31237.

It is an arithmetic number, because the mean of its divisors is an integer number (8559144).

Almost surely, 2^66912067 is an apocalyptic number.

66912067 is a deficient number, since it is larger than the sum of its proper divisors (1561085).

66912067 is a wasteful number, since it uses less digits than its factorization.

66912067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2909.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 66912067 is about 8179.9796454514. The cubic root of 66912067 is about 405.9770486189.

The spelling of 66912067 in words is "sixty-six million, nine hundred twelve thousand, sixty-seven".