25766816 has 12 divisors (see below), whose sum is σ = 50728482. Its totient is φ = 12883392.

The previous prime is 25766813. The next prime is 25766879. The reversal of 25766816 is 61866752.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 163216 = 5060^2 + 404^2 .

It is not an unprimeable number, because it can be changed into a prime (25766813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402575 + ... + 402638.

Almost surely, 2^25766816 is an apocalyptic number.

It is an amenable number.

25766816 is a deficient number, since it is larger than the sum of its proper divisors (24961666).

25766816 is an equidigital number, since it uses as much as digits as its factorization.

25766816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805223 (or 805215 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 25766816 is about 5076.1024418347. The cubic root of 25766816 is about 295.3612962917.

The spelling of 25766816 in words is "twenty-five million, seven hundred sixty-six thousand, eight hundred sixteen".