66773159 has 2 divisors, whose sum is σ = 66773160. Its totient is φ = 66773158.

The previous prime is 66773153. The next prime is 66773177. The reversal of 66773159 is 95137766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66773159 - 2¹² = 66769063 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66773153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33386579 + 33386580.

It is an arithmetic number, because the mean of its divisors is an integer number (33386580).

Almost surely, 2^66773159 is an apocalyptic number.

66773159 is a deficient number, since it is larger than the sum of its proper divisors (1).

66773159 is an equidigital number, since it uses as much as digits as its factorization.

66773159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 44.

The square root of 66773159 is about 8171.4845040543. The cubic root of 66773159 is about 405.6959208077.

The spelling of 66773159 in words is "sixty-six million, seven hundred seventy-three thousand, one hundred fifty-nine".