9366647881 has 2 divisors, whose sum is σ = 9366647882. Its totient is φ = 9366647880.

The previous prime is 9366647863. The next prime is 9366647933. The reversal of 9366647881 is 1887466639.

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., 9363465225 + 3182656 = 96765^2 + 1784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9366647881 is a prime.

It is a super-2 number, since 2×9366647881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9366647821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4683323940 + 4683323941.

It is an arithmetic number, because the mean of its divisors is an integer number (4683323941).

Almost surely, 2^9366647881 is an apocalyptic number.

It is an amenable number.

9366647881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9366647881 is an equidigital number, since it uses as much as digits as its factorization.

9366647881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 58.

The square root of 9366647881 is about 96781.4438877619. The cubic root of 9366647881 is about 2107.9553038788.

The spelling of 9366647881 in words is "nine billion, three hundred sixty-six million, six hundred forty-seven thousand, eight hundred eighty-one".