16664841 has 6 divisors (see below), whose sum is σ = 24071450. Its totient is φ = 11109888.

The previous prime is 16664833. The next prime is 16664861. The reversal of 16664841 is 14846661.

16664841 is digitally balanced in base 2 and base 4, because in such bases 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., 11696400 + 4968441 = 3420^2 + 2229^2 .

It is not a de Polignac number, because 16664841 - 2³ = 16664833 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 16664796 and 16664805.

It is not an unprimeable number, because it can be changed into a prime (16664801) 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, 925816 + ... + 925833.

Almost surely, 2^16664841 is an apocalyptic number.

It is an amenable number.

16664841 is a deficient number, since it is larger than the sum of its proper divisors (7406609).

16664841 is a wasteful number, since it uses less digits than its factorization.

16664841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851655 (or 1851652 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 16664841 is about 4082.2593009264. The cubic root of 16664841 is about 255.4271502867.

The spelling of 16664841 in words is "sixteen million, six hundred sixty-four thousand, eight hundred forty-one".