66014581 has 2 divisors, whose sum is σ = 66014582. Its totient is φ = 66014580.

The previous prime is 66014573. The next prime is 66014591. The reversal of 66014581 is 18541066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34035556 + 31979025 = 5834^2 + 5655^2 .

It is a cyclic number.

It is not a de Polignac number, because 66014581 - 2³ = 66014573 is a prime.

It is a super-2 number, since 2×66014581² = 8715849809211122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66014591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33007290 + 33007291.

It is an arithmetic number, because the mean of its divisors is an integer number (33007291).

Almost surely, 2^66014581 is an apocalyptic number.

It is an amenable number.

66014581 is a deficient number, since it is larger than the sum of its proper divisors (1).

66014581 is an equidigital number, since it uses as much as digits as its factorization.

66014581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 66014581 is about 8124.9357535921. The cubic root of 66014581 is about 404.1537601339.

The spelling of 66014581 in words is "sixty-six million, fourteen thousand, five hundred eighty-one".