66069469 has 2 divisors, whose sum is σ = 66069470. Its totient is φ = 66069468.

The previous prime is 66069467. The next prime is 66069499. The reversal of 66069469 is 96496066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65367225 + 702244 = 8085^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 66069469 - 2¹ = 66069467 is a prime.

It is a super-2 number, since 2×66069469² = 8730349467883922, which contains 22 as substring.

Together with 66069467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66069467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33034734 + 33034735.

It is an arithmetic number, because the mean of its divisors is an integer number (33034735).

Almost surely, 2^66069469 is an apocalyptic number.

It is an amenable number.

66069469 is a deficient number, since it is larger than the sum of its proper divisors (1).

66069469 is an equidigital number, since it uses as much as digits as its factorization.

66069469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 66069469 is about 8128.3128015597. The cubic root of 66069469 is about 404.2657406792.

The spelling of 66069469 in words is "sixty-six million, sixty-nine thousand, four hundred sixty-nine".