2661320143 has 2 divisors, whose sum is σ = 2661320144. Its totient is φ = 2661320142.

The previous prime is 2661320117. The next prime is 2661320159. The reversal of 2661320143 is 3410231662.

2661320143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661320143 - 2¹⁷ = 2661189071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661323143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330660071 + 1330660072.

It is an arithmetic number, because the mean of its divisors is an integer number (1330660072).

Almost surely, 2^2661320143 is an apocalyptic number.

2661320143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661320143 is an equidigital number, since it uses as much as digits as its factorization.

2661320143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2661320143 is about 51587.9844828231. The cubic root of 2661320143 is about 1385.7951605213.

The spelling of 2661320143 in words is "two billion, six hundred sixty-one million, three hundred twenty thousand, one hundred forty-three".