166383390 has 32 divisors (see below), whose sum is σ = 400070016. Its totient is φ = 44285600.

The previous prime is 166383379. The next prime is 166383397. The reversal of 166383390 is 93383661.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166383397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11965 + ... + 21815.

It is an arithmetic number, because the mean of its divisors is an integer number (12502188).

Almost surely, 2^166383390 is an apocalyptic number.

166383390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166383390 is an abundant number, since it is smaller than the sum of its proper divisors (233686626).

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

166383390 is a wasteful number, since it uses less digits than its factorization.

166383390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10424.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 166383390 is about 12898.9685634162. The cubic root of 166383390 is about 550.0092450237.

The spelling of 166383390 in words is "one hundred sixty-six million, three hundred eighty-three thousand, three hundred ninety".