16776625 has 8 divisors (see below), whose sum is σ = 20937384. Its totient is φ = 13421200.

The previous prime is 16776623. The next prime is 16776631. The reversal of 16776625 is 52667761.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 138384 + 16638241 = 372^2 + 4079^2 .

It is not a de Polignac number, because 16776625 - 2¹ = 16776623 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8 and base 16.

It is not an unprimeable number, because it can be changed into a prime (16776623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66982 + ... + 67231.

It is an arithmetic number, because the mean of its divisors is an integer number (2617173).

Almost surely, 2^16776625 is an apocalyptic number.

It is an amenable number.

16776625 is a deficient number, since it is larger than the sum of its proper divisors (4160759).

16776625 is an equidigital number, since it uses as much as digits as its factorization.

16776625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134228 (or 134218 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 16776625 is about 4095.9278558100. The cubic root of 16776625 is about 255.9969939833.

The spelling of 16776625 in words is "sixteen million, seven hundred seventy-six thousand, six hundred twenty-five".