66795218047 has 2 divisors, whose sum is σ = 66795218048. Its totient is φ = 66795218046.

The previous prime is 66795218023. The next prime is 66795218053. The reversal of 66795218047 is 74081259766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66795218047 - 2¹¹ = 66795215999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66795218057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33397609023 + 33397609024.

It is an arithmetic number, because the mean of its divisors is an integer number (33397609024).

Almost surely, 2^66795218047 is an apocalyptic number.

66795218047 is a deficient number, since it is larger than the sum of its proper divisors (1).

66795218047 is an equidigital number, since it uses as much as digits as its factorization.

66795218047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 66795218047 in words is "sixty-six billion, seven hundred ninety-five million, two hundred eighteen thousand, forty-seven".