661456456346350 has 48 divisors (see below), whose sum is σ = 1415504132964000. Its totient is φ = 225263023274880.

The previous prime is 661456456346317. The next prime is 661456456346351. The reversal of 661456456346350 is 53643654654166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661456456346351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6341812245 + ... + 6341916544.

It is an arithmetic number, because the mean of its divisors is an integer number (29489669436750).

Almost surely, 2^{661456456346350} is an apocalyptic number.

661456456346350 is an abundant number, since it is smaller than the sum of its proper divisors (754047676617650).

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

661456456346350 is a wasteful number, since it uses less digits than its factorization.

661456456346350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12683728957 (or 12683728952 counting only the distinct ones).

The product of its (nonzero) digits is 559872000, while the sum is 64.

The spelling of 661456456346350 in words is "six hundred sixty-one trillion, four hundred fifty-six billion, four hundred fifty-six million, three hundred forty-six thousand, three hundred fifty".