66294113 has 2 divisors, whose sum is σ = 66294114. Its totient is φ = 66294112.

The previous prime is 66294103. The next prime is 66294131. The reversal of 66294113 is 31149266.

Together with next prime (66294131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65820769 + 473344 = 8113^2 + 688^2 .

It is a cyclic number.

It is not a de Polignac number, because 66294113 - 2¹² = 66290017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66294113.

It is not a weakly prime, because it can be changed into another prime (66294103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33147056 + 33147057.

It is an arithmetic number, because the mean of its divisors is an integer number (33147057).

Almost surely, 2^66294113 is an apocalyptic number.

It is an amenable number.

66294113 is a deficient number, since it is larger than the sum of its proper divisors (1).

66294113 is an equidigital number, since it uses as much as digits as its factorization.

66294113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 66294113 is about 8142.1196871576. The cubic root of 66294113 is about 404.7234061243.

The spelling of 66294113 in words is "sixty-six million, two hundred ninety-four thousand, one hundred thirteen".