66014257 has 2 divisors, whose sum is σ = 66014258. Its totient is φ = 66014256.

The previous prime is 66014251. The next prime is 66014279. The reversal of 66014257 is 75241066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59582961 + 6431296 = 7719^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 66014257 - 2⁷ = 66014129 is a prime.

It is not a weakly prime, because it can be changed into another prime (66014251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33007128 + 33007129.

It is an arithmetic number, because the mean of its divisors is an integer number (33007129).

Almost surely, 2^66014257 is an apocalyptic number.

It is an amenable number.

66014257 is a deficient number, since it is larger than the sum of its proper divisors (1).

66014257 is an equidigital number, since it uses as much as digits as its factorization.

66014257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 66014257 is about 8124.9158149485. The cubic root of 66014257 is about 404.1530989364.

The spelling of 66014257 in words is "sixty-six million, fourteen thousand, two hundred fifty-seven".