10665553 has 4 divisors (see below), whose sum is σ = 10800640. Its totient is φ = 10530468.

The previous prime is 10665527. The next prime is 10665559. The reversal of 10665553 is 35556601.

10665553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35556601 = 229 ⋅155269.

It is a cyclic number.

It is not a de Polignac number, because 10665553 - 2⁵ = 10665521 is a prime.

It is a super-2 number, since 2×10665553² = 227508041591618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10665559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67425 + ... + 67582.

It is an arithmetic number, because the mean of its divisors is an integer number (2700160).

Almost surely, 2^10665553 is an apocalyptic number.

It is an amenable number.

10665553 is a deficient number, since it is larger than the sum of its proper divisors (135087).

10665553 is an equidigital number, since it uses as much as digits as its factorization.

10665553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135086.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 10665553 is about 3265.8158245682. The cubic root of 10665553 is about 220.1208220632.

The spelling of 10665553 in words is "ten million, six hundred sixty-five thousand, five hundred fifty-three".