66794423 has 2 divisors, whose sum is σ = 66794424. Its totient is φ = 66794422.

The previous prime is 66794401. The next prime is 66794447. The reversal of 66794423 is 32449766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66794423 - 2⁶ = 66794359 is a prime.

It is a super-2 number, since 2×66794423² = 8922989887805858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66794723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33397211 + 33397212.

It is an arithmetic number, because the mean of its divisors is an integer number (33397212).

Almost surely, 2^66794423 is an apocalyptic number.

66794423 is a deficient number, since it is larger than the sum of its proper divisors (1).

66794423 is an equidigital number, since it uses as much as digits as its factorization.

66794423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 66794423 is about 8172.7855104609. The cubic root of 66794423 is about 405.7389810364.

The spelling of 66794423 in words is "sixty-six million, seven hundred ninety-four thousand, four hundred twenty-three".