66687427227139 has 2 divisors, whose sum is σ = 66687427227140. Its totient is φ = 66687427227138.

The previous prime is 66687427227131. The next prime is 66687427227143. The reversal of 66687427227139 is 93172272478666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66687427227139 - 2³ = 66687427227131 is a prime.

It is not a weakly prime, because it can be changed into another prime (66687427227131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33343713613569 + 33343713613570.

It is an arithmetic number, because the mean of its divisors is an integer number (33343713613570).

Almost surely, 2^{66687427227139} is an apocalyptic number.

66687427227139 is a deficient number, since it is larger than the sum of its proper divisors (1).

66687427227139 is an equidigital number, since it uses as much as digits as its factorization.

66687427227139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 512096256, while the sum is 70.

The spelling of 66687427227139 in words is "sixty-six trillion, six hundred eighty-seven billion, four hundred twenty-seven million, two hundred twenty-seven thousand, one hundred thirty-nine".