16669025 has 12 divisors (see below), whose sum is σ = 20962944. Its totient is φ = 13146000.

The previous prime is 16669021. The next prime is 16669033. The reversal of 16669025 is 52096661.

It is a happy number.

It is not a de Polignac number, because 16669025 - 2² = 16669021 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16669021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2921 + ... + 6470.

It is an arithmetic number, because the mean of its divisors is an integer number (1746912).

Almost surely, 2^16669025 is an apocalyptic number.

It is an amenable number.

16669025 is a deficient number, since it is larger than the sum of its proper divisors (4293919).

16669025 is an equidigital number, since it uses as much as digits as its factorization.

16669025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9472 (or 9467 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 16669025 is about 4082.7717300873. The cubic root of 16669025 is about 255.4485249835.

The spelling of 16669025 in words is "sixteen million, six hundred sixty-nine thousand, twenty-five".