7720647606 has 192 divisors, whose sum is σ = 20918476800. Its totient is φ = 2008939968.

The previous prime is 7720647593. The next prime is 7720647607. The reversal of 7720647606 is 6067460277.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720647607) 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, 6637981 + ... + 6639143.

It is an arithmetic number, because the mean of its divisors is an integer number (108950400).

Almost surely, 2^7720647606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7720647606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10459238400).

7720647606 is an abundant number, since it is smaller than the sum of its proper divisors (13197829194).

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

7720647606 is a wasteful number, since it uses less digits than its factorization.

7720647606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The square root of 7720647606 is about 87867.2157633323. The cubic root of 7720647606 is about 1976.4442872310. Note that the first 3 decimals are identical.

The spelling of 7720647606 in words is "seven billion, seven hundred twenty million, six hundred forty-seven thousand, six hundred six".