71660607944 has 8 divisors (see below), whose sum is σ = 134363639910. Its totient is φ = 35830303968.

The previous prime is 71660607923. The next prime is 71660607983. The reversal of 71660607944 is 44970606617.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 54027423844 + 17633184100 = 232438^2 + 132790^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 71660607892 and 71660607901.

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 as a sum of consecutive naturals, namely, 4478787989 + ... + 4478788004.

Almost surely, 2^71660607944 is an apocalyptic number.

It is an amenable number.

71660607944 is a deficient number, since it is larger than the sum of its proper divisors (62703031966).

71660607944 is a wasteful number, since it uses less digits than its factorization.

71660607944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8957575999 (or 8957575995 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 71660607944 in words is "seventy-one billion, six hundred sixty million, six hundred seven thousand, nine hundred forty-four".