661352124324243 has 32 divisors (see below), whose sum is σ = 962429700960000. Its totient is φ = 400626601174400.

The previous prime is 661352124324197. The next prime is 661352124324259. The reversal of 661352124324243 is 342423421253166.

It is a happy number.

661352124324243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 661352124324243 - 2²⁶ = 661352057215379 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 661352124324192 and 661352124324201.

It is not an unprimeable number, because it can be changed into a prime (661352124324293) 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, 703284133 + ... + 704223881.

It is an arithmetic number, because the mean of its divisors is an integer number (30075928155000).

Almost surely, 2^{661352124324243} is an apocalyptic number.

661352124324243 is a deficient number, since it is larger than the sum of its proper divisors (301077576635757).

661352124324243 is a wasteful number, since it uses less digits than its factorization.

661352124324243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950003.

The product of its digits is 4976640, while the sum is 48.

The spelling of 661352124324243 in words is "six hundred sixty-one trillion, three hundred fifty-two billion, one hundred twenty-four million, three hundred twenty-four thousand, two hundred forty-three".