66166933 has 4 divisors (see below), whose sum is σ = 75619360. Its totient is φ = 56714508.

The previous prime is 66166897. The next prime is 66166943. The reversal of 66166933 is 33966166.

66166933 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66166933 - 2⁹ = 66166421 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 (66166943) 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 3 ways as a sum of consecutive naturals, for example, 4726203 + ... + 4726216.

It is an arithmetic number, because the mean of its divisors is an integer number (18904840).

Almost surely, 2^66166933 is an apocalyptic number.

It is an amenable number.

66166933 is a deficient number, since it is larger than the sum of its proper divisors (9452427).

66166933 is an equidigital number, since it uses as much as digits as its factorization.

66166933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9452426.

The product of its digits is 104976, while the sum is 40.

The square root of 66166933 is about 8134.3059322846. The cubic root of 66166933 is about 404.4644305228.

The spelling of 66166933 in words is "sixty-six million, one hundred sixty-six thousand, nine hundred thirty-three".