6663173722 has 16 divisors (see below), whose sum is σ = 10069575912. Its totient is φ = 3306741760.

The previous prime is 6663173711. The next prime is 6663173767. The reversal of 6663173722 is 2273713666.

It can be written as a sum of positive squares in 4 ways, for example, as 6627425281 + 35748441 = 81409^2 + 5979^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121368 + ... + 167500.

Almost surely, 2^6663173722 is an apocalyptic number.

6663173722 is a deficient number, since it is larger than the sum of its proper divisors (3406402190).

6663173722 is a wasteful number, since it uses less digits than its factorization.

6663173722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46673.

The product of its digits is 381024, while the sum is 43.

The square root of 6663173722 is about 81628.2654599496. The cubic root of 6663173722 is about 1881.7433016612.

The spelling of 6663173722 in words is "six billion, six hundred sixty-three million, one hundred seventy-three thousand, seven hundred twenty-two".