166404076672000 has 88 divisors (see below), whose sum is σ = 415141770724200. Its totient is φ = 66561630617600.

The previous prime is 166404076671971. The next prime is 166404076672003. The reversal of 166404076672000 is 276670404661.

It can be written as a sum of positive squares in 4 ways, for example, as 181435106304 + 166222641565696 = 425952^2 + 12892736^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166404076672003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649887925 + ... + 650143924.

Almost surely, 2^{166404076672000} is an apocalyptic number.

166404076672000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166404076672000 is an abundant number, since it is smaller than the sum of its proper divisors (248737694052200).

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

166404076672000 is an equidigital number, since it uses as much as digits as its factorization.

166404076672000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300031884 (or 1300031856 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 166404076672000 in words is "one hundred sixty-six trillion, four hundred four billion, seventy-six million, six hundred seventy-two thousand".