2660540213 has 2 divisors, whose sum is σ = 2660540214. Its totient is φ = 2660540212.

The previous prime is 2660540209. The next prime is 2660540231. The reversal of 2660540213 is 3120450662.

Together with next prime (2660540231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2601204004 + 59336209 = 51002^2 + 7703^2 .

It is a cyclic number.

It is not a de Polignac number, because 2660540213 - 2² = 2660540209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2660540263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330270106 + 1330270107.

It is an arithmetic number, because the mean of its divisors is an integer number (1330270107).

Almost surely, 2^2660540213 is an apocalyptic number.

It is an amenable number.

2660540213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660540213 is an equidigital number, since it uses as much as digits as its factorization.

2660540213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2660540213 is about 51580.4247074411. The cubic root of 2660540213 is about 1385.6597729741.

Adding to 2660540213 its reverse (3120450662), we get a palindrome (5780990875).

The spelling of 2660540213 in words is "two billion, six hundred sixty million, five hundred forty thousand, two hundred thirteen".