661114550352 has 20 divisors (see below), whose sum is σ = 1707879255200. Its totient is φ = 220371516768.

The previous prime is 661114550339. The next prime is 661114550353. The reversal of 661114550352 is 253055411166.

It is a self number, because there is not a number n which added to its sum of digits gives 661114550352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661114550353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6886609852 + ... + 6886609947.

It is an arithmetic number, because the mean of its divisors is an integer number (85393962760).

Almost surely, 2^661114550352 is an apocalyptic number.

It is an amenable number.

661114550352 is an abundant number, since it is smaller than the sum of its proper divisors (1046764704848).

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

661114550352 is a wasteful number, since it uses less digits than its factorization.

661114550352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13773219810 (or 13773219804 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 661114550352 in words is "six hundred sixty-one billion, one hundred fourteen million, five hundred fifty thousand, three hundred fifty-two".