6666323819 has 4 divisors (see below), whose sum is σ = 6808160544. Its totient is φ = 6524487096.

The previous prime is 6666323813. The next prime is 6666323861. The reversal of 6666323819 is 9183236666.

6666323819 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6666323819 - 2³² = 2371356523 is a prime.

It is a super-2 number, since 2×6666323819² = 88879746519533489522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666323813) 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, 70918292 + ... + 70918385.

It is an arithmetic number, because the mean of its divisors is an integer number (1702040136).

Almost surely, 2^6666323819 is an apocalyptic number.

6666323819 is a deficient number, since it is larger than the sum of its proper divisors (141836725).

6666323819 is a wasteful number, since it uses less digits than its factorization.

6666323819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141836724.

The product of its digits is 1679616, while the sum is 50.

The square root of 6666323819 is about 81647.5585611719. The cubic root of 6666323819 is about 1882.0397940083.

The spelling of 6666323819 in words is "six billion, six hundred sixty-six million, three hundred twenty-three thousand, eight hundred nineteen".