66727379 has 2 divisors, whose sum is σ = 66727380. Its totient is φ = 66727378.

The previous prime is 66727343. The next prime is 66727387. The reversal of 66727379 is 97372766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66727379 - 2²⁴ = 49950163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66727399) 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, 33363689 + 33363690.

It is an arithmetic number, because the mean of its divisors is an integer number (33363690).

Almost surely, 2^66727379 is an apocalyptic number.

66727379 is a deficient number, since it is larger than the sum of its proper divisors (1).

66727379 is an equidigital number, since it uses as much as digits as its factorization.

66727379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 47.

The square root of 66727379 is about 8168.6828191576. The cubic root of 66727379 is about 405.6031839172.

The spelling of 66727379 in words is "sixty-six million, seven hundred twenty-seven thousand, three hundred seventy-nine".