661046350000 has 120 divisors (see below), whose sum is σ = 1602578053440. Its totient is φ = 264136320000.

The previous prime is 661046349991. The next prime is 661046350039. The reversal of 661046350000 is 53640166.

661046350000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50443449 + ... + 50456551.

It is an arithmetic number, because the mean of its divisors is an integer number (13354817112).

Almost surely, 2^661046350000 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 661046350000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (801289026720).

661046350000 is an abundant number, since it is smaller than the sum of its proper divisors (941531703440).

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

661046350000 is a wasteful number, since it uses less digits than its factorization.

661046350000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14145 (or 14119 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

Adding to 661046350000 its reverse (53640166), we get a palindrome (661099990166).

The spelling of 661046350000 in words is "six hundred sixty-one billion, forty-six million, three hundred fifty thousand".