66133946 has 8 divisors (see below), whose sum is σ = 104422080. Its totient is φ = 31326588.

The previous prime is 66133939. The next prime is 66133979. The reversal of 66133946 is 64933166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 1740367 = 66133946 / (6 + 6 + 1 + 3 + 3 + 9 + 4 + 6).

It is an unprimeable number.

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, 870146 + ... + 870221.

It is an arithmetic number, because the mean of its divisors is an integer number (13052760).

Almost surely, 2^66133946 is an apocalyptic number.

66133946 is a deficient number, since it is larger than the sum of its proper divisors (38288134).

66133946 is a wasteful number, since it uses less digits than its factorization.

66133946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740388.

The product of its digits is 69984, while the sum is 38.

The square root of 66133946 is about 8132.2780326302. The cubic root of 66133946 is about 404.3972051713.

The spelling of 66133946 in words is "sixty-six million, one hundred thirty-three thousand, nine hundred forty-six".