66014491 has 2 divisors, whose sum is σ = 66014492. Its totient is φ = 66014490.

The previous prime is 66014477. The next prime is 66014513. The reversal of 66014491 is 19441066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66014491 - 2¹⁵ = 65981723 is a prime.

It is not a weakly prime, because it can be changed into another prime (66014471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33007245 + 33007246.

It is an arithmetic number, because the mean of its divisors is an integer number (33007246).

Almost surely, 2^66014491 is an apocalyptic number.

66014491 is a deficient number, since it is larger than the sum of its proper divisors (1).

66014491 is an equidigital number, since it uses as much as digits as its factorization.

66014491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 66014491 is about 8124.9302150849. The cubic root of 66014491 is about 404.1535764681.

It can be divided in two parts, 660 and 14491, that added together give a palindrome (15151).

The spelling of 66014491 in words is "sixty-six million, fourteen thousand, four hundred ninety-one".