166228549 has 8 divisors (see below), whose sum is σ = 175249440. Its totient is φ = 157234896.

The previous prime is 166228523. The next prime is 166228577. The reversal of 166228549 is 945822661.

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

It is a cyclic number.

It is not a de Polignac number, because 166228549 - 2⁹ = 166228037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166028549) 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 7 ways as a sum of consecutive naturals, for example, 6402 + ... + 19324.

It is an arithmetic number, because the mean of its divisors is an integer number (21906180).

Almost surely, 2^166228549 is an apocalyptic number.

166228549 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

166228549 is a deficient number, since it is larger than the sum of its proper divisors (9020891).

166228549 is a wasteful number, since it uses less digits than its factorization.

166228549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13619.

The product of its digits is 207360, while the sum is 43.

The square root of 166228549 is about 12892.9650972924. The cubic root of 166228549 is about 549.8385741135.

The spelling of 166228549 in words is "one hundred sixty-six million, two hundred twenty-eight thousand, five hundred forty-nine".