66880193 has 8 divisors (see below), whose sum is σ = 70921512. Its totient is φ = 62850816.

The previous prime is 66880157. The next prime is 66880199. The reversal of 66880193 is 39108866.

It is a happy number.

66880193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19998784 + 46881409 = 4472^2 + 6847^2 .

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 66880193 - 2⁶ = 66880129 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 66880193.

It is not an unprimeable number, because it can be changed into a prime (66880199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10271 + ... + 15467.

It is an arithmetic number, because the mean of its divisors is an integer number (8865189).

Almost surely, 2^66880193 is an apocalyptic number.

It is an amenable number.

66880193 is a deficient number, since it is larger than the sum of its proper divisors (4041319).

66880193 is a wasteful number, since it uses less digits than its factorization.

66880193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5971.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 66880193 is about 8178.0311200190. The cubic root of 66880193 is about 405.9125751077.

The spelling of 66880193 in words is "sixty-six million, eight hundred eighty thousand, one hundred ninety-three".