66971459 has 2 divisors, whose sum is σ = 66971460. Its totient is φ = 66971458.

The previous prime is 66971413. The next prime is 66971479. The reversal of 66971459 is 95417966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66971459 - 2¹² = 66967363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66971479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33485729 + 33485730.

It is an arithmetic number, because the mean of its divisors is an integer number (33485730).

Almost surely, 2^66971459 is an apocalyptic number.

66971459 is a deficient number, since it is larger than the sum of its proper divisors (1).

66971459 is an equidigital number, since it uses as much as digits as its factorization.

66971459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 47.

The square root of 66971459 is about 8183.6091671096. The cubic root of 66971459 is about 406.0971298911.

The spelling of 66971459 in words is "sixty-six million, nine hundred seventy-one thousand, four hundred fifty-nine".