10240666 has 4 divisors (see below), whose sum is σ = 15361002. Its totient is φ = 5120332.

The previous prime is 10240631. The next prime is 10240673. The reversal of 10240666 is 66604201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66604201 = 6907 ⋅9643.

It can be written as a sum of positive squares in only one way, i.e., 8850625 + 1390041 = 2975^2 + 1179^2 .

It is a super-3 number, since 3×10240666³ (a number of 22 digits) contains 333 as substring.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 10240666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560165 + ... + 2560168.

Almost surely, 2^10240666 is an apocalyptic number.

10240666 is a deficient number, since it is larger than the sum of its proper divisors (5120336).

10240666 is an equidigital number, since it uses as much as digits as its factorization.

10240666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120335.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 10240666 is about 3200.1040608080. The cubic root of 10240666 is about 217.1581170436.

Adding to 10240666 its reverse (66604201), we get a palindrome (76844867).

The spelling of 10240666 in words is "ten million, two hundred forty thousand, six hundred sixty-six".