16777025 has 6 divisors (see below), whose sum is σ = 20803542. Its totient is φ = 13421600.

The previous prime is 16776989. The next prime is 16777027. The reversal of 16777025 is 52077761.

It can be written as a sum of positive squares in 3 ways, for example, as 97969 + 16679056 = 313^2 + 4084^2 .

It is not a de Polignac number, because 16777025 - 2⁶ = 16776961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16777027) 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, 335516 + ... + 335565.

It is an arithmetic number, because the mean of its divisors is an integer number (3467257).

Almost surely, 2^16777025 is an apocalyptic number.

It is an amenable number.

16777025 is a deficient number, since it is larger than the sum of its proper divisors (4026517).

16777025 is an equidigital number, since it uses as much as digits as its factorization.

16777025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671091 (or 671086 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 35.

The square root of 16777025 is about 4095.9766845040. The cubic root of 16777025 is about 255.9990285201. Note that the first 3 decimals are identical.

The spelling of 16777025 in words is "sixteen million, seven hundred seventy-seven thousand, twenty-five".