71866525860 has 96 divisors (see below), whose sum is σ = 226345190400. Its totient is φ = 19164395232.

The previous prime is 71866525777. The next prime is 71866525897. The reversal of 71866525860 is 6852566817.

71866525860 is a `hidden beast` number, since 7 + 1 + 8 + 6 + 6 + 52 + 586 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 71866525797 and 71866525806.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 777780 + ... + 865259.

It is an arithmetic number, because the mean of its divisors is an integer number (2357762400).

Almost surely, 2^71866525860 is an apocalyptic number.

It is an amenable number.

71866525860 is an abundant number, since it is smaller than the sum of its proper divisors (154478664540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71866525860 is a wasteful number, since it uses less digits than its factorization.

71866525860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643069 (or 1643049 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The spelling of 71866525860 in words is "seventy-one billion, eight hundred sixty-six million, five hundred twenty-five thousand, eight hundred sixty".