8266986021 has 16 divisors (see below), whose sum is σ = 12803827328. Its totient is φ = 4646548800.

The previous prime is 8266986019. The next prime is 8266986023. The reversal of 8266986021 is 1206896628.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8266986019) and next prime (8266986023).

It is not a de Polignac number, because 8266986021 - 2¹ = 8266986019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8266986023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3225490 + ... + 3228051.

It is an arithmetic number, because the mean of its divisors is an integer number (800239208).

Almost surely, 2^8266986021 is an apocalyptic number.

It is an amenable number.

8266986021 is a deficient number, since it is larger than the sum of its proper divisors (4536841307).

8266986021 is a wasteful number, since it uses less digits than its factorization.

8266986021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453612.

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 8266986021 is about 90922.9675109650. The cubic root of 8266986021 is about 2022.0058190106.

The spelling of 8266986021 in words is "eight billion, two hundred sixty-six million, nine hundred eighty-six thousand, twenty-one".