6699920136 has 384 divisors, whose sum is σ = 22087618560. Its totient is φ = 1676505600.

The previous prime is 6699920131. The next prime is 6699920153. The reversal of 6699920136 is 6310299966.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6699920131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 31753071 + ... + 31753281.

It is an arithmetic number, because the mean of its divisors is an integer number (57519840).

Almost surely, 2^6699920136 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 6699920136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11043809280).

6699920136 is an abundant number, since it is smaller than the sum of its proper divisors (15387698424).

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

6699920136 is a wasteful number, since it uses less digits than its factorization.

6699920136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 51.

The square root of 6699920136 is about 81853.0398702455. The cubic root of 6699920136 is about 1885.1961404488.

The spelling of 6699920136 in words is "six billion, six hundred ninety-nine million, nine hundred twenty thousand, one hundred thirty-six".