66893017 has 4 divisors (see below), whose sum is σ = 68524596. Its totient is φ = 65261440.

The previous prime is 66892999. The next prime is 66893051. The reversal of 66893017 is 71039866.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20394256 + 46498761 = 4516^2 + 6819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66893017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66893117) 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, 815728 + ... + 815809.

It is an arithmetic number, because the mean of its divisors is an integer number (17131149).

Almost surely, 2^66893017 is an apocalyptic number.

It is an amenable number.

66893017 is a deficient number, since it is larger than the sum of its proper divisors (1631579).

66893017 is a wasteful number, since it uses less digits than its factorization.

66893017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631578.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 66893017 is about 8178.8151342355. The cubic root of 66893017 is about 405.9385174680.

The spelling of 66893017 in words is "sixty-six million, eight hundred ninety-three thousand, seventeen".