71660737056 has 48 divisors (see below), whose sum is σ = 189371952000. Its totient is φ = 23726592768.

The previous prime is 71660737021. The next prime is 71660737061. The reversal of 71660737056 is 65073706617.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×71660737056² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 71660736996 and 71660737014.

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, 2490616 + ... + 2519223.

It is an arithmetic number, because the mean of its divisors is an integer number (3945249000).

Almost surely, 2^71660737056 is an apocalyptic number.

It is an amenable number.

71660737056 is an abundant number, since it is smaller than the sum of its proper divisors (117711214944).

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

71660737056 is a wasteful number, since it uses less digits than its factorization.

71660737056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010001 (or 5009993 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 48.

The spelling of 71660737056 in words is "seventy-one billion, six hundred sixty million, seven hundred thirty-seven thousand, fifty-six".