71220701667 has 16 divisors (see below), whose sum is σ = 96065010720. Its totient is φ = 46928842752.

The previous prime is 71220701653. The next prime is 71220701701. The reversal of 71220701667 is 76610702217.

It is not a de Polignac number, because 71220701667 - 2³⁰ = 70146959843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71220701647) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 659223 + ... + 759615.

It is an arithmetic number, because the mean of its divisors is an integer number (6004063170).

Almost surely, 2^71220701667 is an apocalyptic number.

71220701667 is a deficient number, since it is larger than the sum of its proper divisors (24844309053).

71220701667 is a wasteful number, since it uses less digits than its factorization.

71220701667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103142.

The product of its (nonzero) digits is 49392, while the sum is 39.

The spelling of 71220701667 in words is "seventy-one billion, two hundred twenty million, seven hundred one thousand, six hundred sixty-seven".