166642026 has 8 divisors (see below), whose sum is σ = 333284064. Its totient is φ = 55547340.

The previous prime is 166642013. The next prime is 166642037. The reversal of 166642026 is 620246661.

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

166642026 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13886830 + ... + 13886841.

It is an arithmetic number, because the mean of its divisors is an integer number (41660508).

Almost surely, 2^166642026 is an apocalyptic number.

166642026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166642026 is a wasteful number, since it uses less digits than its factorization.

166642026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27773676.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 166642026 is about 12908.9901231661. The cubic root of 166642026 is about 550.2940862496.

Adding to 166642026 its reverse (620246661), we get a palindrome (786888687).

The spelling of 166642026 in words is "one hundred sixty-six million, six hundred forty-two thousand, twenty-six".