166020738 has 32 divisors (see below), whose sum is σ = 361286016. Its totient is φ = 50554368.

The previous prime is 166020731. The next prime is 166020773. The reversal of 166020738 is 837020661.

166020738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166020699 and 166020708.

It is not an unprimeable number, because it can be changed into a prime (166020731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3406 + ... + 18537.

It is an arithmetic number, because the mean of its divisors is an integer number (11290188).

Almost surely, 2^166020738 is an apocalyptic number.

166020738 is an abundant number, since it is smaller than the sum of its proper divisors (195265278).

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

166020738 is a wasteful number, since it uses less digits than its factorization.

166020738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22058.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 166020738 is about 12884.9034920716. The cubic root of 166020738 is about 549.6093512496.

The spelling of 166020738 in words is "one hundred sixty-six million, twenty thousand, seven hundred thirty-eight".