166443101344661 has 32 divisors (see below), whose sum is σ = 177810739920000. Its totient is φ = 155257924534272.

The previous prime is 166443101344607. The next prime is 166443101344727.

It is a happy number.

166443101344661 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166443101344661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166443101343661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 930701510 + ... + 930880328.

It is an arithmetic number, because the mean of its divisors is an integer number (5556585622500).

Almost surely, 2^{166443101344661} is an apocalyptic number.

It is an amenable number.

166443101344661 is a deficient number, since it is larger than the sum of its proper divisors (11367638575339).

166443101344661 is a wasteful number, since it uses less digits than its factorization.

166443101344661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180101.

The product of its (nonzero) digits is 2985984, while the sum is 50.

It can be divided in two parts, 16644310 and 1344661, that added together give a palindrome (17988971).

The spelling of 166443101344661 in words is "one hundred sixty-six trillion, four hundred forty-three billion, one hundred one million, three hundred forty-four thousand, six hundred sixty-one".