66014251 has 2 divisors, whose sum is σ = 66014252. Its totient is φ = 66014250.

The previous prime is 66014243. The next prime is 66014257. The reversal of 66014251 is 15241066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66014251 - 2³ = 66014243 is a prime.

It is not a weakly prime, because it can be changed into another prime (66014257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33007125 + 33007126.

It is an arithmetic number, because the mean of its divisors is an integer number (33007126).

Almost surely, 2^66014251 is an apocalyptic number.

66014251 is a deficient number, since it is larger than the sum of its proper divisors (1).

66014251 is an equidigital number, since it uses as much as digits as its factorization.

66014251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 66014251 is about 8124.9154457139. The cubic root of 66014251 is about 404.1530866920.

The spelling of 66014251 in words is "sixty-six million, fourteen thousand, two hundred fifty-one".