6721112168 has 8 divisors (see below), whose sum is σ = 12602085330. Its totient is φ = 3360556080.

The previous prime is 6721112137. The next prime is 6721112173. The reversal of 6721112168 is 8612111276.

It can be written as a sum of positive squares in only one way, i.e., 6416330404 + 304781764 = 80102^2 + 17458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420069503 + ... + 420069518.

Almost surely, 2^6721112168 is an apocalyptic number.

It is an amenable number.

6721112168 is a deficient number, since it is larger than the sum of its proper divisors (5880973162).

6721112168 is a wasteful number, since it uses less digits than its factorization.

6721112168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840139027 (or 840139023 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 6721112168 is about 81982.3893772315. The cubic root of 6721112168 is about 1887.1816909133.

The spelling of 6721112168 in words is "six billion, seven hundred twenty-one million, one hundred twelve thousand, one hundred sixty-eight".