756566081 has 2 divisors, whose sum is σ = 756566082. Its totient is φ = 756566080.

The previous prime is 756566033. The next prime is 756566137. The reversal of 756566081 is 180665657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 696115456 + 60450625 = 26384^2 + 7775^2 .

It is a cyclic number.

It is not a de Polignac number, because 756566081 - 2¹⁰ = 756565057 is a prime.

It is a super-2 number, since 2×756566081² = 1144784469839397122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (756566981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378283040 + 378283041.

It is an arithmetic number, because the mean of its divisors is an integer number (378283041).

Almost surely, 2^756566081 is an apocalyptic number.

It is an amenable number.

756566081 is a deficient number, since it is larger than the sum of its proper divisors (1).

756566081 is an equidigital number, since it uses as much as digits as its factorization.

756566081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 756566081 is about 27505.7463269041. The cubic root of 756566081 is about 911.2040098772.

The spelling of 756566081 in words is "seven hundred fifty-six million, five hundred sixty-six thousand, eighty-one".