661096796416 has 288 divisors, whose sum is σ = 1619754554880. Its totient is φ = 262862143488.

The previous prime is 661096796413. The next prime is 661096796417. The reversal of 661096796416 is 614697690166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (661096796411) 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, 873311110 + ... + 873311866.

It is an arithmetic number, because the mean of its divisors is an integer number (5624147760).

Almost surely, 2^661096796416 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 661096796416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809877277440).

661096796416 is an abundant number, since it is smaller than the sum of its proper divisors (958657758464).

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

661096796416 is a wasteful number, since it uses less digits than its factorization.

661096796416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 661096796416 in words is "six hundred sixty-one billion, ninety-six million, seven hundred ninety-six thousand, four hundred sixteen".