66446794 has 4 divisors (see below), whose sum is σ = 99670194. Its totient is φ = 33223396.

The previous prime is 66446791. The next prime is 66446797. The reversal of 66446794 is 49764466.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (66446791) and next prime (66446797).

It can be written as a sum of positive squares in only one way, i.e., 40487769 + 25959025 = 6363^2 + 5095^2 .

It is not an unprimeable number, because it can be changed into a prime (66446791) by changing a digit.

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 as a sum of consecutive naturals, namely, 16611697 + ... + 16611700.

Almost surely, 2^66446794 is an apocalyptic number.

66446794 is a deficient number, since it is larger than the sum of its proper divisors (33223400).

66446794 is a wasteful number, since it uses less digits than its factorization.

66446794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33223399.

The product of its digits is 870912, while the sum is 46.

The square root of 66446794 is about 8151.4902931918. The cubic root of 66446794 is about 405.0338720845.

The spelling of 66446794 in words is "sixty-six million, four hundred forty-six thousand, seven hundred ninety-four".