6688604149 has 4 divisors (see below), whose sum is σ = 6690664800. Its totient is φ = 6686543500.

The previous prime is 6688604147. The next prime is 6688604161. The reversal of 6688604149 is 9414068866.

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 6688604149 - 2¹ = 6688604147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6688604096 and 6688604105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6688604141) 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, 1025449 + ... + 1031950.

It is an arithmetic number, because the mean of its divisors is an integer number (1672666200).

Almost surely, 2^6688604149 is an apocalyptic number.

It is an amenable number.

6688604149 is a deficient number, since it is larger than the sum of its proper divisors (2060651).

6688604149 is a wasteful number, since it uses less digits than its factorization.

6688604149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060650.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The square root of 6688604149 is about 81783.8868543187. The cubic root of 6688604149 is about 1884.1341936358.

The spelling of 6688604149 in words is "six billion, six hundred eighty-eight million, six hundred four thousand, one hundred forty-nine".