66979327 has 2 divisors, whose sum is σ = 66979328. Its totient is φ = 66979326.

The previous prime is 66979259. The next prime is 66979331. The reversal of 66979327 is 72397966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66979327 - 2¹¹ = 66977279 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66979387) 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, 33489663 + 33489664.

It is an arithmetic number, because the mean of its divisors is an integer number (33489664).

Almost surely, 2^66979327 is an apocalyptic number.

66979327 is a deficient number, since it is larger than the sum of its proper divisors (1).

66979327 is an equidigital number, since it uses as much as digits as its factorization.

66979327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 49.

The square root of 66979327 is about 8184.0898699855. The cubic root of 66979327 is about 406.1130324221.

The spelling of 66979327 in words is "sixty-six million, nine hundred seventy-nine thousand, three hundred twenty-seven".