66666667337 has 2 divisors, whose sum is σ = 66666667338. Its totient is φ = 66666667336.

The previous prime is 66666667307. The next prime is 66666667369. The reversal of 66666667337 is 73376666666.

It is a happy number.

66666667337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57540495376 + 9126171961 = 239876^2 + 95531^2 .

It is a cyclic number.

It is not a de Polignac number, because 66666667337 - 2¹⁸ = 66666405193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66666667337.

It is not a weakly prime, because it can be changed into another prime (66666667307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333333668 + 33333333669.

It is an arithmetic number, because the mean of its divisors is an integer number (33333333669).

Almost surely, 2^66666667337 is an apocalyptic number.

It is an amenable number.

66666667337 is a deficient number, since it is larger than the sum of its proper divisors (1).

66666667337 is an equidigital number, since it uses as much as digits as its factorization.

66666667337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123451776, while the sum is 62.

The spelling of 66666667337 in words is "sixty-six billion, six hundred sixty-six million, six hundred sixty-seven thousand, three hundred thirty-seven".