6642032899 has 2 divisors, whose sum is σ = 6642032900. Its totient is φ = 6642032898.

The previous prime is 6642032879. The next prime is 6642032927. The reversal of 6642032899 is 9982302466.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6642032899 - 2¹¹ = 6642030851 is a prime.

It is not a weakly prime, because it can be changed into another prime (6642032849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3321016449 + 3321016450.

It is an arithmetic number, because the mean of its divisors is an integer number (3321016450).

Almost surely, 2^6642032899 is an apocalyptic number.

6642032899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642032899 is an equidigital number, since it uses as much as digits as its factorization.

6642032899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 6642032899 is about 81498.6680811411. The cubic root of 6642032899 is about 1879.7510703870.

The spelling of 6642032899 in words is "six billion, six hundred forty-two million, thirty-two thousand, eight hundred ninety-nine".