8021662699 has 4 divisors (see below), whose sum is σ = 8030768760. Its totient is φ = 8012556640.

The previous prime is 8021662697. The next prime is 8021662709. The reversal of 8021662699 is 9962661208.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8021662699 - 2¹ = 8021662697 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8021662697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4551709 + ... + 4553470.

It is an arithmetic number, because the mean of its divisors is an integer number (2007692190).

Almost surely, 2^8021662699 is an apocalyptic number.

8021662699 is a deficient number, since it is larger than the sum of its proper divisors (9106061).

8021662699 is an equidigital number, since it uses as much as digits as its factorization.

8021662699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106060.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 8021662699 is about 89563.7354011098. The cubic root of 8021662699 is about 2001.8035979450.

The spelling of 8021662699 in words is "eight billion, twenty-one million, six hundred sixty-two thousand, six hundred ninety-nine".