66183861077 has 2 divisors, whose sum is σ = 66183861078. Its totient is φ = 66183861076.

The previous prime is 66183861061. The next prime is 66183861113. The reversal of 66183861077 is 77016838166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39978402916 + 26205458161 = 199946^2 + 161881^2 .

It is a cyclic number.

It is not a de Polignac number, because 66183861077 - 2⁴ = 66183861061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66183861017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33091930538 + 33091930539.

It is an arithmetic number, because the mean of its divisors is an integer number (33091930539).

Almost surely, 2^66183861077 is an apocalyptic number.

It is an amenable number.

66183861077 is a deficient number, since it is larger than the sum of its proper divisors (1).

66183861077 is an equidigital number, since it uses as much as digits as its factorization.

66183861077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 66183861077 in words is "sixty-six billion, one hundred eighty-three million, eight hundred sixty-one thousand, seventy-seven".