661032355654000 has 320 divisors, whose sum is σ = 1817538392097792. Its totient is φ = 230388022656000.

The previous prime is 661032355653983. The next prime is 661032355654009. The reversal of 661032355654000 is 456553230166.

661032355654000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661032355654009) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 48477709 + ... + 60598291.

Almost surely, 2^{661032355654000} 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 661032355654000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908769196048896).

661032355654000 is an abundant number, since it is smaller than the sum of its proper divisors (1156506036443792).

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

661032355654000 is a wasteful number, since it uses less digits than its factorization.

661032355654000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12120721 (or 12120705 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 661032355654000 in words is "six hundred sixty-one trillion, thirty-two billion, three hundred fifty-five million, six hundred fifty-four thousand".