166239408 has 30 divisors (see below), whose sum is σ = 429682692. Its totient is φ = 55383360.

The previous prime is 166239401. The next prime is 166239421. The reversal of 166239408 is 804932661.

It is not an unprimeable number, because it can be changed into a prime (166239401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88398 + ... + 90258.

Almost surely, 2^166239408 is an apocalyptic number.

It is an amenable number.

166239408 is an abundant number, since it is smaller than the sum of its proper divisors (263443284).

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

166239408 is an frugal number, since it uses more digits than its factorization.

166239408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733 (or 1866 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 166239408 is about 12893.3862115427. The cubic root of 166239408 is about 549.8505467201.

Multiplying 166239408 by its product of nonzero digits (62208), we get a square (10341421092864 = 3215808²).

The spelling of 166239408 in words is "one hundred sixty-six million, two hundred thirty-nine thousand, four hundred eight".