661253561113116 has 24 divisors (see below), whose sum is σ = 1558201460843664. Its totient is φ = 218235498716800.

The previous prime is 661253561113091. The next prime is 661253561113163. The reversal of 661253561113116 is 611311165352166.

661253561113116 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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272794372185 + ... + 272794374608.

It is an arithmetic number, because the mean of its divisors is an integer number (64925060868486).

Almost surely, 2^{661253561113116} is an apocalyptic number.

It is an amenable number.

661253561113116 is an abundant number, since it is smaller than the sum of its proper divisors (896947899730548).

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

661253561113116 is a wasteful number, since it uses less digits than its factorization.

661253561113116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545588746901 (or 545588746899 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The spelling of 661253561113116 in words is "six hundred sixty-one trillion, two hundred fifty-three billion, five hundred sixty-one million, one hundred thirteen thousand, one hundred sixteen".