66752669 has 2 divisors, whose sum is σ = 66752670. Its totient is φ = 66752668.

The previous prime is 66752663. The next prime is 66752677. The reversal of 66752669 is 96625766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66227044 + 525625 = 8138^2 + 725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66752669 is a prime.

It is a super-3 number, since 3×66752669³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66752663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33376334 + 33376335.

It is an arithmetic number, because the mean of its divisors is an integer number (33376335).

Almost surely, 2^66752669 is an apocalyptic number.

It is an amenable number.

66752669 is a deficient number, since it is larger than the sum of its proper divisors (1).

66752669 is an equidigital number, since it uses as much as digits as its factorization.

66752669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The square root of 66752669 is about 8170.2306576987. The cubic root of 66752669 is about 405.6544193024.

The spelling of 66752669 in words is "sixty-six million, seven hundred fifty-two thousand, six hundred sixty-nine".