71563520066 has 16 divisors (see below), whose sum is σ = 107751785856. Its totient is φ = 35646304176.

The previous prime is 71563520029. The next prime is 71563520099. The reversal of 71563520066 is 66002536517.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6014375 + ... + 6026261.

It is an arithmetic number, because the mean of its divisors is an integer number (6734486616).

Almost surely, 2^71563520066 is an apocalyptic number.

71563520066 is a deficient number, since it is larger than the sum of its proper divisors (36188265790).

71563520066 is a wasteful number, since it uses less digits than its factorization.

71563520066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23033.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 71563520066 in words is "seventy-one billion, five hundred sixty-three million, five hundred twenty thousand, sixty-six".