71866157208 has 64 divisors (see below), whose sum is σ = 185899298400. Its totient is φ = 23124541440.

The previous prime is 71866157161. The next prime is 71866157249. The reversal of 71866157208 is 80275166817.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5096728 + ... + 5110808.

Almost surely, 2^71866157208 is an apocalyptic number.

It is an amenable number.

71866157208 is an abundant number, since it is smaller than the sum of its proper divisors (114033141192).

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

71866157208 is a wasteful number, since it uses less digits than its factorization.

71866157208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21452 (or 21448 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 71866157208 in words is "seventy-one billion, eight hundred sixty-six million, one hundred fifty-seven thousand, two hundred eight".