6685353869 has 4 divisors (see below), whose sum is σ = 6733450080. Its totient is φ = 6637257660.

The previous prime is 6685353839. The next prime is 6685353881. The reversal of 6685353869 is 9683535866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6685353869 - 2⁸ = 6685353613 is a prime.

It is a super-2 number, since 2×6685353869² = 89387912707506538322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685353809) 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, 24047897 + ... + 24048174.

It is an arithmetic number, because the mean of its divisors is an integer number (1683362520).

Almost surely, 2^6685353869 is an apocalyptic number.

It is an amenable number.

6685353869 is a deficient number, since it is larger than the sum of its proper divisors (48096211).

6685353869 is a wasteful number, since it uses less digits than its factorization.

6685353869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48096210.

The product of its digits is 27993600, while the sum is 59.

The square root of 6685353869 is about 81764.0132882431. The cubic root of 6685353869 is about 1883.8289502803.

The spelling of 6685353869 in words is "six billion, six hundred eighty-five million, three hundred fifty-three thousand, eight hundred sixty-nine".