616000111661 has 8 divisors (see below), whose sum is σ = 672069537984. Its totient is φ = 559942254720.

The previous prime is 616000111631. The next prime is 616000111667. The reversal of 616000111661 is 166111000616.

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

It is a cyclic number.

It is not a de Polignac number, because 616000111661 - 2²² = 615995917357 is a prime.

It is a super-3 number, since 3×616000111661³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616000111667) 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, 2780825 + ... + 2994158.

It is an arithmetic number, because the mean of its divisors is an integer number (84008692248).

Almost surely, 2^616000111661 is an apocalyptic number.

It is an amenable number.

616000111661 is a deficient number, since it is larger than the sum of its proper divisors (56069426323).

616000111661 is a wasteful number, since it uses less digits than its factorization.

616000111661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5784691.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 616000111661 in words is "six hundred sixteen billion, one hundred eleven thousand, six hundred sixty-one".