2660143553 has 4 divisors (see below), whose sum is σ = 2716742400. Its totient is φ = 2603544708.

The previous prime is 2660143513. The next prime is 2660143657. The reversal of 2660143553 is 3553410662.

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.

It is a cyclic number.

It is not a de Polignac number, because 2660143553 - 2⁶ = 2660143489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2660143513) 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, 28299353 + ... + 28299446.

It is an arithmetic number, because the mean of its divisors is an integer number (679185600).

Almost surely, 2^2660143553 is an apocalyptic number.

It is an amenable number.

2660143553 is a deficient number, since it is larger than the sum of its proper divisors (56598847).

2660143553 is an equidigital number, since it uses as much as digits as its factorization.

2660143553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56598846.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 2660143553 is about 51576.5795007773. The cubic root of 2660143553 is about 1385.5909068694.

The spelling of 2660143553 in words is "two billion, six hundred sixty million, one hundred forty-three thousand, five hundred fifty-three".