66334693 has 4 divisors (see below), whose sum is σ = 66512908. Its totient is φ = 66156480.

The previous prime is 66334669. The next prime is 66334721. The reversal of 66334693 is 39643366.

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 37368769 + 28965924 = 6113^2 + 5382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66334693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66334393) 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, 88548 + ... + 89293.

It is an arithmetic number, because the mean of its divisors is an integer number (16628227).

Almost surely, 2^66334693 is an apocalyptic number.

It is an amenable number.

66334693 is a deficient number, since it is larger than the sum of its proper divisors (178215).

66334693 is a wasteful number, since it uses less digits than its factorization.

66334693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178214.

The product of its digits is 209952, while the sum is 40.

The square root of 66334693 is about 8144.6112859976. The cubic root of 66334693 is about 404.8059691409.

The spelling of 66334693 in words is "sixty-six million, three hundred thirty-four thousand, six hundred ninety-three".