1326663689 has 12 divisors (see below), whose sum is σ = 1467138816. Its totient is φ = 1198549872.

The previous prime is 1326663673. The next prime is 1326663719. The reversal of 1326663689 is 9863666231.

It is not a de Polignac number, because 1326663689 - 2⁴ = 1326663673 is a prime.

It is a super-2 number, since 2×1326663689² = 3520073087422177442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1326663589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75569 + ... + 91454.

It is an arithmetic number, because the mean of its divisors is an integer number (122261568).

Almost surely, 2^1326663689 is an apocalyptic number.

It is an amenable number.

1326663689 is a deficient number, since it is larger than the sum of its proper divisors (140475127).

1326663689 is a wasteful number, since it uses less digits than its factorization.

1326663689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167096 (or 167083 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The square root of 1326663689 is about 36423.3948033403. The cubic root of 1326663689 is about 1098.8041243302.

The spelling of 1326663689 in words is "one billion, three hundred twenty-six million, six hundred sixty-three thousand, six hundred eighty-nine".