71680037966 has 4 divisors (see below), whose sum is σ = 107520056952. Its totient is φ = 35840018982.

The previous prime is 71680037921. The next prime is 71680037981. The reversal of 71680037966 is 66973008617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66973008617 = 3067 ⋅21836651.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17920009490 + ... + 17920009493.

It is an arithmetic number, because the mean of its divisors is an integer number (26880014238).

Almost surely, 2^71680037966 is an apocalyptic number.

71680037966 is a deficient number, since it is larger than the sum of its proper divisors (35840018986).

71680037966 is a wasteful number, since it uses less digits than its factorization.

71680037966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35840018985.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 71680037966 in words is "seventy-one billion, six hundred eighty million, thirty-seven thousand, nine hundred sixty-six".