8257664 has 16 divisors (see below), whose sum is σ = 16451070. Its totient is φ = 4128768.

The previous prime is 8257643. The next prime is 8257673. The reversal of 8257664 is 4667528.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7795264 + 462400 = 2792^2 + 680^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32129 + ... + 32384.

Almost surely, 2^8257664 is an apocalyptic number.

It is an amenable number.

8257664 is a deficient number, since it is larger than the sum of its proper divisors (8193406).

8257664 is an equidigital number, since it uses as much as digits as its factorization.

8257664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64527 (or 64515 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 8257664 is about 2873.6151447262. The cubic root of 8257664 is about 202.1245514912.

The spelling of 8257664 in words is "eight million, two hundred fifty-seven thousand, six hundred sixty-four".