6971151668 has 12 divisors (see below), whose sum is σ = 13137939780. Its totient is φ = 3217454592.

The previous prime is 6971151647. The next prime is 6971151679. The reversal of 6971151668 is 8661511796.

It can be written as a sum of positive squares in 2 ways, for example, as 444450724 + 6526700944 = 21082^2 + 80788^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67030253 + ... + 67030356.

It is an arithmetic number, because the mean of its divisors is an integer number (1094828315).

Almost surely, 2^6971151668 is an apocalyptic number.

It is an amenable number.

6971151668 is a deficient number, since it is larger than the sum of its proper divisors (6166788112).

6971151668 is a wasteful number, since it uses less digits than its factorization.

6971151668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134060626 (or 134060624 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 6971151668 is about 83493.4229026455. The cubic root of 6971151668 is about 1910.2997133903.

The spelling of 6971151668 in words is "six billion, nine hundred seventy-one million, one hundred fifty-one thousand, six hundred sixty-eight".