16641004 has 12 divisors (see below), whose sum is σ = 29194200. Its totient is φ = 8299808.

The previous prime is 16640999. The next prime is 16641019. The reversal of 16641004 is 40014661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3289 + ... + 6640.

It is an arithmetic number, because the mean of its divisors is an integer number (2432850).

Almost surely, 2^16641004 is an apocalyptic number.

It is an amenable number.

16641004 is a deficient number, since it is larger than the sum of its proper divisors (12553196).

16641004 is a wasteful number, since it uses less digits than its factorization.

16641004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10352 (or 10350 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16641004 is about 4079.3386718928. The cubic root of 16641004 is about 255.3053064940.

Adding to 16641004 its reverse (40014661), we get a palindrome (56655665).

It can be divided in two parts, 1664100 and 4, that multiplied together give a square (6656400 = 2580²).

The spelling of 16641004 in words is "sixteen million, six hundred forty-one thousand, four".