166005444 has 48 divisors (see below), whose sum is σ = 440939520. Its totient is φ = 48116640.

The previous prime is 166005439. The next prime is 166005449. The reversal of 166005444 is 444500661.

It is an interprime number because it is at equal distance from previous prime (166005439) and next prime (166005449).

It is not an unprimeable number, because it can be changed into a prime (166005449) 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, 24304 + ... + 30375.

It is an arithmetic number, because the mean of its divisors is an integer number (9186240).

Almost surely, 2^166005444 is an apocalyptic number.

It is an amenable number.

166005444 is an abundant number, since it is smaller than the sum of its proper divisors (274934076).

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

166005444 is a wasteful number, since it uses less digits than its factorization.

166005444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54720 (or 54718 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 166005444 is about 12884.3099931661. The cubic root of 166005444 is about 549.5924738730.

The spelling of 166005444 in words is "one hundred sixty-six million, five thousand, four hundred forty-four".