6697985359 has 4 divisors (see below), whose sum is σ = 7213215016. Its totient is φ = 6182755704.

The previous prime is 6697985353. The next prime is 6697985381. The reversal of 6697985359 is 9535897966.

It is a happy number.

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 6697985359 - 2³ = 6697985351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6697985294 and 6697985303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6697985351) 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, 257614809 + ... + 257614834.

It is an arithmetic number, because the mean of its divisors is an integer number (1803303754).

Almost surely, 2^6697985359 is an apocalyptic number.

6697985359 is a deficient number, since it is larger than the sum of its proper divisors (515229657).

6697985359 is a wasteful number, since it uses less digits than its factorization.

6697985359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515229656.

The product of its digits is 110224800, while the sum is 67.

The square root of 6697985359 is about 81841.2204148985. The cubic root of 6697985359 is about 1885.0146564304.

The spelling of 6697985359 in words is "six billion, six hundred ninety-seven million, nine hundred eighty-five thousand, three hundred fifty-nine".