66006769 has 2 divisors, whose sum is σ = 66006770. Its totient is φ = 66006768.

The previous prime is 66006739. The next prime is 66006793. The reversal of 66006769 is 96760066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44957025 + 21049744 = 6705^2 + 4588^2 .

It is a cyclic number.

It is not a de Polignac number, because 66006769 - 2¹¹ = 66004721 is a prime.

It is a super-2 number, since 2×66006769² = 8713787107638722, which contains 22 as substring.

It is a Chen prime.

It is equal to p_3896518 and since 66006769 and 3896518 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66006709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33003384 + 33003385.

It is an arithmetic number, because the mean of its divisors is an integer number (33003385).

Almost surely, 2^66006769 is an apocalyptic number.

It is an amenable number.

66006769 is a deficient number, since it is larger than the sum of its proper divisors (1).

66006769 is an equidigital number, since it uses as much as digits as its factorization.

66006769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 66006769 is about 8124.4549971060. The cubic root of 66006769 is about 404.1378173241.

The spelling of 66006769 in words is "sixty-six million, six thousand, seven hundred sixty-nine".