6641012513 has 2 divisors, whose sum is σ = 6641012514. Its totient is φ = 6641012512.

The previous prime is 6641012507. The next prime is 6641012561. The reversal of 6641012513 is 3152101466.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6500068129 + 140944384 = 80623^2 + 11872^2 .

It is a cyclic number.

It is not a de Polignac number, because 6641012513 - 2²⁰ = 6639963937 is a prime.

It is not a weakly prime, because it can be changed into another prime (6641012503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320506256 + 3320506257.

It is an arithmetic number, because the mean of its divisors is an integer number (3320506257).

Almost surely, 2^6641012513 is an apocalyptic number.

It is an amenable number.

6641012513 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641012513 is an equidigital number, since it uses as much as digits as its factorization.

6641012513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 6641012513 is about 81492.4077015767. The cubic root of 6641012513 is about 1879.6548061892.

Adding to 6641012513 its reverse (3152101466), we get a palindrome (9793113979).

The spelling of 6641012513 in words is "six billion, six hundred forty-one million, twelve thousand, five hundred thirteen".