6686737189 has 4 divisors (see below), whose sum is σ = 7294622400. Its totient is φ = 6078851980.

The previous prime is 6686737181. The next prime is 6686737201. The reversal of 6686737189 is 9817376866.

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 6686737189 - 2³ = 6686737181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6686737181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303942589 + ... + 303942610.

It is an arithmetic number, because the mean of its divisors is an integer number (1823655600).

Almost surely, 2^6686737189 is an apocalyptic number.

It is an amenable number.

6686737189 is a deficient number, since it is larger than the sum of its proper divisors (607885211).

6686737189 is a wasteful number, since it uses less digits than its factorization.

6686737189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607885210.

The product of its digits is 18289152, while the sum is 61.

The square root of 6686737189 is about 81772.4720734307. The cubic root of 6686737189 is about 1883.9588740209.

The spelling of 6686737189 in words is "six billion, six hundred eighty-six million, seven hundred thirty-seven thousand, one hundred eighty-nine".