166021926 has 64 divisors (see below), whose sum is σ = 405319680. Its totient is φ = 44311680.

The previous prime is 166021873. The next prime is 166021937. The reversal of 166021926 is 629120661.

166021926 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35560 + ... + 39956.

It is an arithmetic number, because the mean of its divisors is an integer number (6333120).

Almost surely, 2^166021926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166021926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202659840).

166021926 is an abundant number, since it is smaller than the sum of its proper divisors (239297754).

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

166021926 is a wasteful number, since it uses less digits than its factorization.

166021926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 166021926 is about 12884.9495924509. The cubic root of 166021926 is about 549.6106621989.

It can be divided in two parts, 16602 and 1926, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 166021926 in words is "one hundred sixty-six million, twenty-one thousand, nine hundred twenty-six".