10259666 has 4 divisors (see below), whose sum is σ = 15389502. Its totient is φ = 5129832.

The previous prime is 10259663. The next prime is 10259699. The reversal of 10259666 is 66695201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6175225 + 4084441 = 2485^2 + 2021^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10259663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2564915 + ... + 2564918.

Almost surely, 2^10259666 is an apocalyptic number.

10259666 is a deficient number, since it is larger than the sum of its proper divisors (5129836).

10259666 is an equidigital number, since it uses as much as digits as its factorization.

10259666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129835.

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

The square root of 10259666 is about 3203.0713385749. The cubic root of 10259666 is about 217.2923353690.

The spelling of 10259666 in words is "ten million, two hundred fifty-nine thousand, six hundred sixty-six".