661043365163301 has 16 divisors (see below), whose sum is σ = 900151399296000. Its totient is φ = 431315604788208.

The previous prime is 661043365163297. The next prime is 661043365163323. The reversal of 661043365163301 is 103361563340166.

661043365163301 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 661043365163301 - 2² = 661043365163297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661043365163381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215711 + ... + 36380828.

It is an arithmetic number, because the mean of its divisors is an integer number (56259462456000).

Almost surely, 2^{661043365163301} is an apocalyptic number.

It is an amenable number.

661043365163301 is a deficient number, since it is larger than the sum of its proper divisors (239108034132699).

661043365163301 is a wasteful number, since it uses less digits than its factorization.

661043365163301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37721288.

The product of its (nonzero) digits is 2099520, while the sum is 48.

The spelling of 661043365163301 in words is "six hundred sixty-one trillion, forty-three billion, three hundred sixty-five million, one hundred sixty-three thousand, three hundred one".