166706471 has 12 divisors (see below), whose sum is σ = 183205320. Its totient is φ = 151482240.

The previous prime is 166706443. The next prime is 166706483. The reversal of 166706471 is 174607661.

It is not a de Polignac number, because 166706471 - 2¹⁴ = 166690087 is a prime.

It is a super-3 number, since 3×166706471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166706401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1565 + ... + 18326.

It is an arithmetic number, because the mean of its divisors is an integer number (15267110).

Almost surely, 2^166706471 is an apocalyptic number.

166706471 is a deficient number, since it is larger than the sum of its proper divisors (16498849).

166706471 is a wasteful number, since it uses less digits than its factorization.

166706471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19954 (or 19937 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 166706471 is about 12911.4860105257. The cubic root of 166706471 is about 550.3650149995.

The spelling of 166706471 in words is "one hundred sixty-six million, seven hundred six thousand, four hundred seventy-one".