6666396319 has 16 divisors (see below), whose sum is σ = 7319579904. Its totient is φ = 6021188800.

The previous prime is 6666396313. The next prime is 6666396323. The reversal of 6666396319 is 9136936666.

It is not a de Polignac number, because 6666396319 - 2¹¹ = 6666394271 is a prime.

It is a super-2 number, since 2×6666396319² = 88881679763953499522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6666396319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666396313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1286604 + ... + 1291774.

It is an arithmetic number, because the mean of its divisors is an integer number (457473744).

Almost surely, 2^6666396319 is an apocalyptic number.

6666396319 is a deficient number, since it is larger than the sum of its proper divisors (653183585).

6666396319 is a wasteful number, since it uses less digits than its factorization.

6666396319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5918.

The product of its digits is 5668704, while the sum is 55.

The square root of 6666396319 is about 81648.0025413972. The cubic root of 6666396319 is about 1882.0466167287.

The spelling of 6666396319 in words is "six billion, six hundred sixty-six million, three hundred ninety-six thousand, three hundred nineteen".