166941206433920 has 128 divisors (see below), whose sum is σ = 399448463420160. Its totient is φ = 66717166759936.

The previous prime is 166941206433913. The next prime is 166941206433929. The reversal of 166941206433920 is 29334602149661.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×166941206433920² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166941206433929) 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, 4275371837 + ... + 4275410883.

It is an arithmetic number, because the mean of its divisors is an integer number (3120691120470).

Almost surely, 2^{166941206433920} is an apocalyptic number.

166941206433920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166941206433920 is an abundant number, since it is smaller than the sum of its proper divisors (232507256986240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166941206433920 is a wasteful number, since it uses less digits than its factorization.

166941206433920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44830 (or 44818 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 166941206433920 in words is "one hundred sixty-six trillion, nine hundred forty-one billion, two hundred six million, four hundred thirty-three thousand, nine hundred twenty".