166704887354880 has 640 divisors, whose sum is σ = 610734112800768. Its totient is φ = 37999886303232.

The previous prime is 166704887354821. The next prime is 166704887354897. The reversal of 166704887354880 is 88453788407661.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 68126229817 + ... + 68126232263.

Almost surely, 2^{166704887354880} is an apocalyptic number.

166704887354880 is a gapful number since it is divisible by the number (10) 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 166704887354880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305367056400384).

166704887354880 is an abundant number, since it is smaller than the sum of its proper divisors (444029225445888).

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

166704887354880 is a wasteful number, since it uses less digits than its factorization.

166704887354880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5426 (or 5410 counting only the distinct ones).

The product of its (nonzero) digits is 1734082560, while the sum is 75.

The spelling of 166704887354880 in words is "one hundred sixty-six trillion, seven hundred four billion, eight hundred eighty-seven million, three hundred fifty-four thousand, eight hundred eighty".