8066921643 has 12 divisors (see below), whose sum is σ = 12711513048. Its totient is φ = 4889043360.

The previous prime is 8066921623. The next prime is 8066921669. The reversal of 8066921643 is 3461296608.

It is not a de Polignac number, because 8066921643 - 2¹⁶ = 8066856107 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (8066921623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40741930 + ... + 40742127.

It is an arithmetic number, because the mean of its divisors is an integer number (1059292754).

Almost surely, 2^8066921643 is an apocalyptic number.

8066921643 is a deficient number, since it is larger than the sum of its proper divisors (4644591405).

8066921643 is a wasteful number, since it uses less digits than its factorization.

8066921643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81484074 (or 81484071 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 8066921643 is about 89816.0433497268. The cubic root of 8066921643 is about 2005.5613250815.

The spelling of 8066921643 in words is "eight billion, sixty-six million, nine hundred twenty-one thousand, six hundred forty-three".