71147668 has 12 divisors (see below), whose sum is σ = 125908020. Its totient is φ = 35173952.

The previous prime is 71147641. The next prime is 71147689. The reversal of 71147668 is 86674117.

It can be written as a sum of positive squares in 2 ways, for example, as 40985604 + 30162064 = 6402^2 + 5492^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71147668.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 99571 + ... + 100282.

It is an arithmetic number, because the mean of its divisors is an integer number (10492335).

Almost surely, 2^71147668 is an apocalyptic number.

It is an amenable number.

71147668 is a deficient number, since it is larger than the sum of its proper divisors (54760352).

71147668 is a wasteful number, since it uses less digits than its factorization.

71147668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199946 (or 199944 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 71147668 is about 8434.9077054820. The cubic root of 71147668 is about 414.3686495193.

The spelling of 71147668 in words is "seventy-one million, one hundred forty-seven thousand, six hundred sixty-eight".