661163230016353 has 8 divisors (see below), whose sum is σ = 665051423236200. Its totient is φ = 657275800480128.

The previous prime is 661163230016351. The next prime is 661163230016369. The reversal of 661163230016353 is 353610032361166.

It can be written as a sum of positive squares in 4 ways, for example, as 415407661928704 + 245755568087649 = 20381552^2 + 15676593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 661163230016353 - 2¹ = 661163230016351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661163230016351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189184258 + ... + 192647371.

It is an arithmetic number, because the mean of its divisors is an integer number (83131427904525).

Almost surely, 2^{661163230016353} is an apocalyptic number.

It is an amenable number.

661163230016353 is a deficient number, since it is larger than the sum of its proper divisors (3888193219847).

661163230016353 is a wasteful number, since it uses less digits than its factorization.

661163230016353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381841811.

The product of its (nonzero) digits is 1049760, while the sum is 46.

The spelling of 661163230016353 in words is "six hundred sixty-one trillion, one hundred sixty-three billion, two hundred thirty million, sixteen thousand, three hundred fifty-three".