6697443999 has 4 divisors (see below), whose sum is σ = 8929925336. Its totient is φ = 4464962664.

The previous prime is 6697443989. The next prime is 6697444001. The reversal of 6697443999 is 9993447966.

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

It is not a de Polignac number, because 6697443999 - 2⁴ = 6697443983 is a prime.

It is a super-2 number, since 2×6697443999² = 89711512239482224002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6697443979) 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 3 ways as a sum of consecutive naturals, for example, 1116240664 + ... + 1116240669.

It is an arithmetic number, because the mean of its divisors is an integer number (2232481334).

Almost surely, 2^6697443999 is an apocalyptic number.

6697443999 is a deficient number, since it is larger than the sum of its proper divisors (2232481337).

6697443999 is a wasteful number, since it uses less digits than its factorization.

6697443999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232481336.

The product of its digits is 79361856, while the sum is 66.

The square root of 6697443999 is about 81837.9129682570. The cubic root of 6697443999 is about 1884.9638700634.

The spelling of 6697443999 in words is "six billion, six hundred ninety-seven million, four hundred forty-three thousand, nine hundred ninety-nine".