8766746921 has 2 divisors, whose sum is σ = 8766746922. Its totient is φ = 8766746920.

The previous prime is 8766746917. The next prime is 8766746969. The reversal of 8766746921 is 1296476678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8202019225 + 564727696 = 90565^2 + 23764^2 .

It is a cyclic number.

It is not a de Polignac number, because 8766746921 - 2² = 8766746917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8766716921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4383373460 + 4383373461.

It is an arithmetic number, because the mean of its divisors is an integer number (4383373461).

Almost surely, 2^8766746921 is an apocalyptic number.

It is an amenable number.

8766746921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8766746921 is an equidigital number, since it uses as much as digits as its factorization.

8766746921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 56.

The square root of 8766746921 is about 93630.9079364288. The cubic root of 8766746921 is about 2061.9564566395.

The spelling of 8766746921 in words is "eight billion, seven hundred sixty-six million, seven hundred forty-six thousand, nine hundred twenty-one".