6423799866 has 32 divisors (see below), whose sum is σ = 14038515648. Its totient is φ = 1943418240.

The previous prime is 6423799861. The next prime is 6423799873. The reversal of 6423799866 is 6689973246.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6423799861) 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 in 15 ways as a sum of consecutive naturals, for example, 38931 + ... + 119846.

It is an arithmetic number, because the mean of its divisors is an integer number (438703614).

Almost surely, 2^6423799866 is an apocalyptic number.

6423799866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6423799866 is an abundant number, since it is smaller than the sum of its proper divisors (7614715782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6423799866 is a wasteful number, since it uses less digits than its factorization.

6423799866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159406.

The product of its digits is 23514624, while the sum is 60.

The square root of 6423799866 is about 80148.6111295760. The cubic root of 6423799866 is about 1858.9341280174.

The spelling of 6423799866 in words is "six billion, four hundred twenty-three million, seven hundred ninety-nine thousand, eight hundred sixty-six".