166443816 has 64 divisors (see below), whose sum is σ = 518791680. Its totient is φ = 43231680.

The previous prime is 166443811. The next prime is 166443829. The reversal of 166443816 is 618344661.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (166443811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43186 + ... + 46881.

It is an arithmetic number, because the mean of its divisors is an integer number (8106120).

Almost surely, 2^166443816 is an apocalyptic number.

It is an amenable number.

166443816 is an abundant number, since it is smaller than the sum of its proper divisors (352347864).

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

166443816 is a wasteful number, since it uses less digits than its factorization.

166443816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90094 (or 90090 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 166443816 is about 12901.3106310948. The cubic root of 166443816 is about 550.0758198505.

The spelling of 166443816 in words is "one hundred sixty-six million, four hundred forty-three thousand, eight hundred sixteen".