6620722606 has 16 divisors (see below), whose sum is σ = 9979329024. Its totient is φ = 3294319104.

The previous prime is 6620722561. The next prime is 6620722621. The reversal of 6620722606 is 6062270266.

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, 340606 + ... + 359518.

It is an arithmetic number, because the mean of its divisors is an integer number (623708064).

Almost surely, 2^6620722606 is an apocalyptic number.

6620722606 is a deficient number, since it is larger than the sum of its proper divisors (3358606418).

6620722606 is a wasteful number, since it uses less digits than its factorization.

6620722606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19755.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 6620722606 is about 81367.8229154498. The cubic root of 6620722606 is about 1877.7385859591.

The spelling of 6620722606 in words is "six billion, six hundred twenty million, seven hundred twenty-two thousand, six hundred six".