166171782 has 16 divisors (see below), whose sum is σ = 379821312. Its totient is φ = 47477640.

The previous prime is 166171781. The next prime is 166171793. The reversal of 166171782 is 287171661.

166171782 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166171782² = 55226122266111048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166171782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166171781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1978194 + ... + 1978277.

It is an arithmetic number, because the mean of its divisors is an integer number (23738832).

Almost surely, 2^166171782 is an apocalyptic number.

166171782 is an abundant number, since it is smaller than the sum of its proper divisors (213649530).

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

166171782 is a wasteful number, since it uses less digits than its factorization.

166171782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956483.

The product of its digits is 28224, while the sum is 39.

The square root of 166171782 is about 12890.7634374385. The cubic root of 166171782 is about 549.7759770842.

The spelling of 166171782 in words is "one hundred sixty-six million, one hundred seventy-one thousand, seven hundred eighty-two".