616647666460 has 96 divisors (see below), whose sum is σ = 1558791360000. Its totient is φ = 200173130496.

The previous prime is 616647666449. The next prime is 616647666463. The reversal of 616647666460 is 64666746616.

It is a junction number, because it is equal to n+sod(n) for n = 616647666395 and 616647666404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616647666463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4370091 + ... + 4508989.

It is an arithmetic number, because the mean of its divisors is an integer number (16237410000).

Almost surely, 2^616647666460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616647666460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779395680000).

616647666460 is an abundant number, since it is smaller than the sum of its proper divisors (942143693540).

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

616647666460 is a wasteful number, since it uses less digits than its factorization.

616647666460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140603 (or 140601 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 58.

The spelling of 616647666460 in words is "six hundred sixteen billion, six hundred forty-seven million, six hundred sixty-six thousand, four hundred sixty".