8756666537 has 2 divisors, whose sum is σ = 8756666538. Its totient is φ = 8756666536.

The previous prime is 8756666509. The next prime is 8756666623. The reversal of 8756666537 is 7356666578.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8719077376 + 37589161 = 93376^2 + 6131^2 .

It is a cyclic number.

It is not a de Polignac number, because 8756666537 - 2²⁰ = 8755617961 is a prime.

It is not a weakly prime, because it can be changed into another prime (8756665537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4378333268 + 4378333269.

It is an arithmetic number, because the mean of its divisors is an integer number (4378333269).

Almost surely, 2^8756666537 is an apocalyptic number.

It is an amenable number.

8756666537 is a deficient number, since it is larger than the sum of its proper divisors (1).

8756666537 is an equidigital number, since it uses as much as digits as its factorization.

8756666537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38102400, while the sum is 59.

The square root of 8756666537 is about 93577.0620237673. The cubic root of 8756666537 is about 2061.1658446914.

The spelling of 8756666537 in words is "eight billion, seven hundred fifty-six million, six hundred sixty-six thousand, five hundred thirty-seven".