1327605665 has 16 divisors (see below), whose sum is σ = 1621831680. Its totient is φ = 1043090880.

The previous prime is 1327605661. The next prime is 1327605679. The reversal of 1327605665 is 5665067231.

It is not a de Polignac number, because 1327605665 - 2² = 1327605661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1327605661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66647 + ... + 84243.

It is an arithmetic number, because the mean of its divisors is an integer number (101364480).

Almost surely, 2^1327605665 is an apocalyptic number.

It is an amenable number.

1327605665 is a deficient number, since it is larger than the sum of its proper divisors (294226015).

1327605665 is a wasteful number, since it uses less digits than its factorization.

1327605665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17872.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 1327605665 is about 36436.3234286886. The cubic root of 1327605665 is about 1099.0641254760.

The spelling of 1327605665 in words is "one billion, three hundred twenty-seven million, six hundred five thousand, six hundred sixty-five".