6506722066 has 24 divisors (see below), whose sum is σ = 10598247360. Its totient is φ = 2994681456.

The previous prime is 6506722063. The next prime is 6506722081. The reversal of 6506722066 is 6602276056.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6506722063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94531 + ... + 148153.

It is an arithmetic number, because the mean of its divisors is an integer number (441593640).

Almost surely, 2^6506722066 is an apocalyptic number.

6506722066 is a deficient number, since it is larger than the sum of its proper divisors (4091525294).

6506722066 is a wasteful number, since it uses less digits than its factorization.

6506722066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54010 (or 53997 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 6506722066 is about 80664.2551939829. The cubic root of 6506722066 is about 1866.8986948749.

The spelling of 6506722066 in words is "six billion, five hundred six million, seven hundred twenty-two thousand, sixty-six".