66388366 has 32 divisors (see below), whose sum is σ = 119011680. Its totient is φ = 27417600.

The previous prime is 66388363. The next prime is 66388381.

66388366 is nontrivially palindromic in base 10.

66388366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66388363) 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 15 ways as a sum of consecutive naturals, for example, 7786 + ... + 13906.

It is an arithmetic number, because the mean of its divisors is an integer number (3719115).

Almost surely, 2^66388366 is an apocalyptic number.

66388366 is a deficient number, since it is larger than the sum of its proper divisors (52623314).

66388366 is a wasteful number, since it uses less digits than its factorization.

66388366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180.

The product of its digits is 746496, while the sum is 46.

The square root of 66388366 is about 8147.9056204647. The cubic root of 66388366 is about 404.9151191319.

The spelling of 66388366 in words is "sixty-six million, three hundred eighty-eight thousand, three hundred sixty-six".