6659723616 has 192 divisors, whose sum is σ = 22782187008. Its totient is φ = 1653055488.

The previous prime is 6659723597. The next prime is 6659723627. The reversal of 6659723616 is 6163279566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126091 + ... + 170933.

It is an arithmetic number, because the mean of its divisors is an integer number (118657224).

Almost surely, 2^6659723616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6659723616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11391093504).

6659723616 is an abundant number, since it is smaller than the sum of its proper divisors (16122463392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6659723616 is a wasteful number, since it uses less digits than its factorization.

6659723616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44893 (or 44885 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 51.

The square root of 6659723616 is about 81607.1296885266. The cubic root of 6659723616 is about 1881.4184647303.

The spelling of 6659723616 in words is "six billion, six hundred fifty-nine million, seven hundred twenty-three thousand, six hundred sixteen".