16643080 has 16 divisors (see below), whose sum is σ = 37447020. Its totient is φ = 6657216.

The previous prime is 16643023. The next prime is 16643087. The reversal of 16643080 is 8034661.

It can be written as a sum of positive squares in 2 ways, for example, as 16630084 + 12996 = 4078^2 + 114^2 .

It is a super-2 number, since 2×16643080² = 553984223772800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16643087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207999 + ... + 208078.

Almost surely, 2^16643080 is an apocalyptic number.

16643080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16643080 is an abundant number, since it is smaller than the sum of its proper divisors (20803940).

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

16643080 is a wasteful number, since it uses less digits than its factorization.

16643080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416088 (or 416084 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16643080 is about 4079.5931169664. The cubic root of 16643080 is about 255.3159226759.

The spelling of 16643080 in words is "sixteen million, six hundred forty-three thousand, eighty".