1066140553 has 4 divisors (see below), whose sum is σ = 1066268368. Its totient is φ = 1066012740.

The previous prime is 1066140539. The next prime is 1066140571. The reversal of 1066140553 is 3550416601.

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: 3550416601 = 97 ⋅36602233.

It is a cyclic number.

It is not a de Polignac number, because 1066140553 - 2⁹ = 1066140041 is a prime.

It is a super-2 number, since 2×1066140553² = 2273311357502291618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066140583) 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, 50451 + ... + 68392.

It is an arithmetic number, because the mean of its divisors is an integer number (266567092).

Almost surely, 2^1066140553 is an apocalyptic number.

It is an amenable number.

1066140553 is a deficient number, since it is larger than the sum of its proper divisors (127815).

1066140553 is an equidigital number, since it uses as much as digits as its factorization.

1066140553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127814.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1066140553 is about 32651.8078060006. The cubic root of 1066140553 is about 1021.5778964547.

The spelling of 1066140553 in words is "one billion, sixty-six million, one hundred forty thousand, five hundred fifty-three".