166841919101 has 16 divisors (see below), whose sum is σ = 196021607040. Its totient is φ = 139998976320.

The previous prime is 166841919053. The next prime is 166841919137. The reversal of 166841919101 is 101919148661.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 166841919101 - 2¹⁸ = 166841656957 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 (166841919191) 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, 4459991 + ... + 4497243.

It is an arithmetic number, because the mean of its divisors is an integer number (12251350440).

Almost surely, 2^166841919101 is an apocalyptic number.

166841919101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166841919101 is a deficient number, since it is larger than the sum of its proper divisors (29179687939).

166841919101 is a wasteful number, since it uses less digits than its factorization.

166841919101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68596.

The product of its (nonzero) digits is 93312, while the sum is 47.

The spelling of 166841919101 in words is "one hundred sixty-six billion, eight hundred forty-one million, nine hundred nineteen thousand, one hundred one".