6687373789 has 4 divisors (see below), whose sum is σ = 6696806620. Its totient is φ = 6677940960.

The previous prime is 6687373753. The next prime is 6687373801. The reversal of 6687373789 is 9873737866.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2365363225 + 4322010564 = 48635^2 + 65742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6687373789 is a prime.

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 6687373789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687374789) 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, 4715352 + ... + 4716769.

It is an arithmetic number, because the mean of its divisors is an integer number (1674201655).

Almost surely, 2^6687373789 is an apocalyptic number.

It is an amenable number.

6687373789 is a deficient number, since it is larger than the sum of its proper divisors (9432831).

6687373789 is an equidigital number, since it uses as much as digits as its factorization.

6687373789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9432830.

The product of its digits is 64012032, while the sum is 64.

The square root of 6687373789 is about 81776.3644887690. The cubic root of 6687373789 is about 1884.0186585430.

The spelling of 6687373789 in words is "six billion, six hundred eighty-seven million, three hundred seventy-three thousand, seven hundred eighty-nine".