661343202343166 has 8 divisors (see below), whose sum is σ = 1133731204016880. Its totient is φ = 283432801004208.

The previous prime is 661343202343163. The next prime is 661343202343199.

661343202343166 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661343202343163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23619400083671 + ... + 23619400083698.

It is an arithmetic number, because the mean of its divisors is an integer number (141716400502110).

Almost surely, 2^{661343202343166} is an apocalyptic number.

661343202343166 is a deficient number, since it is larger than the sum of its proper divisors (472388001673714).

661343202343166 is a wasteful number, since it uses less digits than its factorization.

661343202343166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47238800167378.

The product of its (nonzero) digits is 6718464, while the sum is 50.

It can be divided in two parts, 66134320 and 2343166, that added together give a palindrome (68477486).

The spelling of 661343202343166 in words is "six hundred sixty-one trillion, three hundred forty-three billion, two hundred two million, three hundred forty-three thousand, one hundred sixty-six".