616211710661 has 8 divisors (see below), whose sum is σ = 646853848704. Its totient is φ = 585890433040.

The previous prime is 616211710651. The next prime is 616211710711. The reversal of 616211710661 is 166017112616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616211710661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616211710651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80211170 + ... + 80218851.

It is an arithmetic number, because the mean of its divisors is an integer number (80856731088).

Almost surely, 2^616211710661 is an apocalyptic number.

It is an amenable number.

616211710661 is a deficient number, since it is larger than the sum of its proper divisors (30642138043).

616211710661 is a wasteful number, since it uses less digits than its factorization.

616211710661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160430211.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 616211710661 in words is "six hundred sixteen billion, two hundred eleven million, seven hundred ten thousand, six hundred sixty-one".