166443100 has 18 divisors (see below), whose sum is σ = 361181744. Its totient is φ = 66577200.

The previous prime is 166443077. The next prime is 166443103. The reversal of 166443100 is 1344661.

It is a super-2 number, since 2×166443100² = 55406611075220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166443103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 832116 + ... + 832315.

Almost surely, 2^166443100 is an apocalyptic number.

166443100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166443100 is an abundant number, since it is smaller than the sum of its proper divisors (194738644).

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

166443100 is a wasteful number, since it uses less digits than its factorization.

166443100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664445 (or 1664438 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 166443100 is about 12901.2828819463. The cubic root of 166443100 is about 550.0750310861.

Adding to 166443100 its reverse (1344661), we get a palindrome (167787761).

The spelling of 166443100 in words is "one hundred sixty-six million, four hundred forty-three thousand, one hundred".