166584406 has 8 divisors (see below), whose sum is σ = 254591424. Its totient is φ = 81720600.

The previous prime is 166584401. The next prime is 166584413. The reversal of 166584406 is 604485661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×166584406³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166584401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785670 + ... + 785881.

It is an arithmetic number, because the mean of its divisors is an integer number (31823928).

Almost surely, 2^166584406 is an apocalyptic number.

166584406 is a deficient number, since it is larger than the sum of its proper divisors (88007018).

166584406 is a wasteful number, since it uses less digits than its factorization.

166584406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571606.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 166584406 is about 12906.7581522240. The cubic root of 166584406 is about 550.2306536704.

The spelling of 166584406 in words is "one hundred sixty-six million, five hundred eighty-four thousand, four hundred six".