166884354123270 has 128 divisors (see below), whose sum is σ = 460155762293760. Its totient is φ = 37943998371840.

The previous prime is 166884354123259. The next prime is 166884354123313. The reversal of 166884354123270 is 72321453488661.

166884354123270 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166884354123270² (a number of 29 digits) contains 22 as substring.

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, 48186130 + ... + 51533210.

It is an arithmetic number, because the mean of its divisors is an integer number (3594966892920).

Almost surely, 2^{166884354123270} is an apocalyptic number.

166884354123270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166884354123270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230077881146880).

166884354123270 is an abundant number, since it is smaller than the sum of its proper divisors (293271408170490).

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

166884354123270 is a wasteful number, since it uses less digits than its factorization.

166884354123270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348350.

The product of its (nonzero) digits is 46448640, while the sum is 60.

The spelling of 166884354123270 in words is "one hundred sixty-six trillion, eight hundred eighty-four billion, three hundred fifty-four million, one hundred twenty-three thousand, two hundred seventy".