661122343221166 has 32 divisors (see below), whose sum is σ = 1046869143955200. Its totient is φ = 312265745890560.

The previous prime is 661122343221101. The next prime is 661122343221169.

661122343221166 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661122343221169) 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, 412875261 + ... + 414473431.

It is an arithmetic number, because the mean of its divisors is an integer number (32714660748600).

Almost surely, 2^{661122343221166} is an apocalyptic number.

661122343221166 is a deficient number, since it is larger than the sum of its proper divisors (385746800734034).

661122343221166 is a wasteful number, since it uses less digits than its factorization.

661122343221166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629384.

The product of its digits is 746496, while the sum is 46.

The spelling of 661122343221166 in words is "six hundred sixty-one trillion, one hundred twenty-two billion, three hundred forty-three million, two hundred twenty-one thousand, one hundred sixty-six".