166254064128 has 240 divisors, whose sum is σ = 486454864896. Its totient is φ = 54656040960.

The previous prime is 166254064091. The next prime is 166254064129. The reversal of 166254064128 is 821460452661.

It is a happy number.

166254064128 is a `hidden beast` number, since 1 + 6 + 62 + 540 + 6 + 41 + 2 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (166254064129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192646225 + ... + 192647087.

Almost surely, 2^166254064128 is an apocalyptic number.

166254064128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166254064128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243227432448).

166254064128 is an abundant number, since it is smaller than the sum of its proper divisors (320200800768).

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

166254064128 is an equidigital number, since it uses as much as digits as its factorization.

166254064128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1396 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 166254064128 in words is "one hundred sixty-six billion, two hundred fifty-four million, sixty-four thousand, one hundred twenty-eight".