2661340530533 has 4 divisors (see below), whose sum is σ = 2661352844460. Its totient is φ = 2661328216608.

The previous prime is 2661340530517. The next prime is 2661340530551. The reversal of 2661340530533 is 3350350431662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2427981007204 + 233359523329 = 1558198^2 + 483073^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661340530533 - 2⁴ = 2661340530517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661340530553) 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, 5826878 + ... + 6266991.

It is an arithmetic number, because the mean of its divisors is an integer number (665338211115).

Almost surely, 2^{2661340530533} is an apocalyptic number.

It is an amenable number.

2661340530533 is a deficient number, since it is larger than the sum of its proper divisors (12313927).

2661340530533 is a wasteful number, since it uses less digits than its factorization.

2661340530533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12313926.

The product of its (nonzero) digits is 583200, while the sum is 41.

The spelling of 2661340530533 in words is "two trillion, six hundred sixty-one billion, three hundred forty million, five hundred thirty thousand, five hundred thirty-three".