66375057366 has 32 divisors (see below), whose sum is σ = 149701630080. Its totient is φ = 21794793768.

The previous prime is 66375057341. The next prime is 66375057367.

It is a happy number.

66375057366 is a `hidden beast` number, since 6 + 6 + 3 + 7 + 5 + 0 + 573 + 66 = 666.

66375057366 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66375057367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9169276 + ... + 9176511.

It is an arithmetic number, because the mean of its divisors is an integer number (4678175940).

Almost surely, 2^66375057366 is an apocalyptic number.

66375057366 is an abundant number, since it is smaller than the sum of its proper divisors (83326572714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66375057366 is a wasteful number, since it uses less digits than its factorization.

66375057366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18345865 (or 18345859 counting only the distinct ones).

The product of its (nonzero) digits is 14288400, while the sum is 54.

The spelling of 66375057366 in words is "sixty-six billion, three hundred seventy-five million, fifty-seven thousand, three hundred sixty-six".