66214073 has 2 divisors, whose sum is σ = 66214074. Its totient is φ = 66214072.

The previous prime is 66214063. The next prime is 66214091. The reversal of 66214073 is 37041266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65237929 + 976144 = 8077^2 + 988^2 .

It is a cyclic number.

It is not a de Polignac number, because 66214073 - 2⁸ = 66213817 is a prime.

It is not a weakly prime, because it can be changed into another prime (66214003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33107036 + 33107037.

It is an arithmetic number, because the mean of its divisors is an integer number (33107037).

Almost surely, 2^66214073 is an apocalyptic number.

It is an amenable number.

66214073 is a deficient number, since it is larger than the sum of its proper divisors (1).

66214073 is an equidigital number, since it uses as much as digits as its factorization.

66214073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66214073 is about 8137.2030206945. The cubic root of 66214073 is about 404.5604599959.

The spelling of 66214073 in words is "sixty-six million, two hundred fourteen thousand, seventy-three".