161312681966 has 8 divisors (see below), whose sum is σ = 242002405944. Its totient is φ = 80645213320.

The previous prime is 161312681939. The next prime is 161312682001. The reversal of 161312681966 is 669186213161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent 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, 5545700 + ... + 5574711.

It is an arithmetic number, because the mean of its divisors is an integer number (30250300743).

Almost surely, 2^161312681966 is an apocalyptic number.

161312681966 is a deficient number, since it is larger than the sum of its proper divisors (80689723978).

161312681966 is a wasteful number, since it uses less digits than its factorization.

161312681966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11127666.

The product of its digits is 559872, while the sum is 50.

The spelling of 161312681966 in words is "one hundred sixty-one billion, three hundred twelve million, six hundred eighty-one thousand, nine hundred sixty-six".