71065670015 has 4 divisors (see below), whose sum is σ = 85278804024. Its totient is φ = 56852536008.

The previous prime is 71065670003. The next prime is 71065670023. The reversal of 71065670015 is 51007656017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51007656017 = 523 ⋅97528979.

It is a cyclic number.

It is not a de Polignac number, because 71065670015 - 2¹⁰ = 71065668991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7106566997 + ... + 7106567006.

It is an arithmetic number, because the mean of its divisors is an integer number (21319701006).

Almost surely, 2^71065670015 is an apocalyptic number.

71065670015 is a deficient number, since it is larger than the sum of its proper divisors (14213134009).

71065670015 is a wasteful number, since it uses less digits than its factorization.

71065670015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14213134008.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 71065670015 in words is "seventy-one billion, sixty-five million, six hundred seventy thousand, fifteen".