166663944 has 24 divisors (see below), whose sum is σ = 451381710. Its totient is φ = 55554624.

The previous prime is 166663933. The next prime is 166663951. The reversal of 166663944 is 449366661.

166663944 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 125216100 + 41447844 = 11190^2 + 6438^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×166663944³ (a number of 26 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 166663944.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1157317 + ... + 1157460.

Almost surely, 2^166663944 is an apocalyptic number.

It is an amenable number.

166663944 is an abundant number, since it is smaller than the sum of its proper divisors (284717766).

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

166663944 is a wasteful number, since it uses less digits than its factorization.

166663944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314789 (or 2314782 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 166663944 is about 12909.8390385008. The cubic root of 166663944 is about 550.3182114504.

The spelling of 166663944 in words is "one hundred sixty-six million, six hundred sixty-three thousand, nine hundred forty-four".