66871710892 has 12 divisors (see below), whose sum is σ = 133743421840. Its totient is φ = 28659304656.

The previous prime is 66871710839. The next prime is 66871710923. The reversal of 66871710892 is 29801717866.

66871710892 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194137667 + ... + 1194137722.

Almost surely, 2^66871710892 is an apocalyptic number.

It is an amenable number.

66871710892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66871710892 is a wasteful number, since it uses less digits than its factorization.

66871710892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388275400 (or 2388275398 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 55.

The spelling of 66871710892 in words is "sixty-six billion, eight hundred seventy-one million, seven hundred ten thousand, eight hundred ninety-two".