1326066613 has 4 divisors (see below), whose sum is σ = 1345858720. Its totient is φ = 1306274508.

The previous prime is 1326066559. The next prime is 1326066629. The reversal of 1326066613 is 3166606231.

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 1326066613 - 2¹³ = 1326058421 is a prime.

It is a super-2 number, since 2×1326066613² = 3516905324226583538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326066653) 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, 9895953 + ... + 9896086.

It is an arithmetic number, because the mean of its divisors is an integer number (336464680).

Almost surely, 2^1326066613 is an apocalyptic number.

It is an amenable number.

1326066613 is a deficient number, since it is larger than the sum of its proper divisors (19792107).

1326066613 is an equidigital number, since it uses as much as digits as its factorization.

1326066613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19792106.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 1326066613 is about 36415.1975554163. The cubic root of 1326066613 is about 1098.6392576237.

The spelling of 1326066613 in words is "one billion, three hundred twenty-six million, sixty-six thousand, six hundred thirteen".