16663425 has 24 divisors (see below), whose sum is σ = 28227360. Its totient is φ = 8668800.

The previous prime is 16663421. The next prime is 16663433. The reversal of 16663425 is 52436661.

16663425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16663425 - 2² = 16663421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16663421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366 + ... + 5784.

It is an arithmetic number, because the mean of its divisors is an integer number (1176140).

Almost surely, 2^16663425 is an apocalyptic number.

16663425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16663425 is a deficient number, since it is larger than the sum of its proper divisors (11563935).

16663425 is a wasteful number, since it uses less digits than its factorization.

16663425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473 (or 5468 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 16663425 is about 4082.0858638691. The cubic root of 16663425 is about 255.4199155924.

The spelling of 16663425 in words is "sixteen million, six hundred sixty-three thousand, four hundred twenty-five".