6620722625766 has 16 divisors (see below), whose sum is σ = 13372548671088. Its totient is φ = 2185056972000.

The previous prime is 6620722625747. The next prime is 6620722625857. The reversal of 6620722625766 is 6675262270266.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5462641825 + ... + 5462643036.

It is an arithmetic number, because the mean of its divisors is an integer number (835784291943).

Almost surely, 2^{6620722625766} is an apocalyptic number.

6620722625766 is an abundant number, since it is smaller than the sum of its proper divisors (6751826045322).

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

6620722625766 is a wasteful number, since it uses less digits than its factorization.

6620722625766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10925284967.

The product of its (nonzero) digits is 30481920, while the sum is 57.

The spelling of 6620722625766 in words is "six trillion, six hundred twenty billion, seven hundred twenty-two million, six hundred twenty-five thousand, seven hundred sixty-six".