66070769 has 2 divisors, whose sum is σ = 66070770. Its totient is φ = 66070768.

The previous prime is 66070759. The next prime is 66070793. The reversal of 66070769 is 96707066.

66070769 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., 65820769 + 250000 = 8113^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 66070769 - 2²⁰ = 65022193 is a prime.

It is a super-2 number, since 2×66070769² = 8730693032502722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66070709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33035384 + 33035385.

It is an arithmetic number, because the mean of its divisors is an integer number (33035385).

Almost surely, 2^66070769 is an apocalyptic number.

It is an amenable number.

66070769 is a deficient number, since it is larger than the sum of its proper divisors (1).

66070769 is an equidigital number, since it uses as much as digits as its factorization.

66070769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 66070769 is about 8128.3927685613. The cubic root of 66070769 is about 404.2683921410.

The spelling of 66070769 in words is "sixty-six million, seventy thousand, seven hundred sixty-nine".