166412223450 has 144 divisors (see below), whose sum is σ = 488115740736. Its totient is φ = 40311206400.

The previous prime is 166412223379. The next prime is 166412223553. The reversal of 166412223450 is 54322214661.

166412223450 is a `hidden beast` number, since 1 + 6 + 6 + 412 + 2 + 234 + 5 + 0 = 666.

It is a super-2 number, since 2×166412223450² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6754354 + ... + 6778946.

It is an arithmetic number, because the mean of its divisors is an integer number (3389692644).

Almost surely, 2^166412223450 is an apocalyptic number.

166412223450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166412223450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244057870368).

166412223450 is an abundant number, since it is smaller than the sum of its proper divisors (321703517286).

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

166412223450 is a wasteful number, since it uses less digits than its factorization.

166412223450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25989 (or 25981 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 166412223450 in words is "one hundred sixty-six billion, four hundred twelve million, two hundred twenty-three thousand, four hundred fifty".