8266510621 has 2 divisors, whose sum is σ = 8266510622. Its totient is φ = 8266510620.

The previous prime is 8266510543. The next prime is 8266510643. The reversal of 8266510621 is 1260156628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5385504996 + 2881005625 = 73386^2 + 53675^2 .

It is a cyclic number.

It is not a de Polignac number, because 8266510621 - 2²³ = 8258122013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8266510691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4133255310 + 4133255311.

It is an arithmetic number, because the mean of its divisors is an integer number (4133255311).

Almost surely, 2^8266510621 is an apocalyptic number.

It is an amenable number.

8266510621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8266510621 is an equidigital number, since it uses as much as digits as its factorization.

8266510621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 8266510621 is about 90920.3531724333. The cubic root of 8266510621 is about 2021.9670592179.

The spelling of 8266510621 in words is "eight billion, two hundred sixty-six million, five hundred ten thousand, six hundred twenty-one".