66251873316 has 12 divisors (see below), whose sum is σ = 154587704432. Its totient is φ = 22083957768.

The previous prime is 66251873287. The next prime is 66251873381. The reversal of 66251873316 is 61337815266.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2760494710 + ... + 2760494733.

Almost surely, 2^66251873316 is an apocalyptic number.

It is an amenable number.

66251873316 is an abundant number, since it is smaller than the sum of its proper divisors (88335831116).

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

66251873316 is a wasteful number, since it uses less digits than its factorization.

66251873316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5520989450 (or 5520989448 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The spelling of 66251873316 in words is "sixty-six billion, two hundred fifty-one million, eight hundred seventy-three thousand, three hundred sixteen".