1327002661 has 4 divisors (see below), whose sum is σ = 1357863232. Its totient is φ = 1296142092.

The previous prime is 1327002659. The next prime is 1327002671. The reversal of 1327002661 is 1662007231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1662007231 = 53 ⋅31358627.

It is a cyclic number.

It is not a de Polignac number, because 1327002661 - 2¹ = 1327002659 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 (1327002631) 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, 15430221 + ... + 15430306.

It is an arithmetic number, because the mean of its divisors is an integer number (339465808).

Almost surely, 2^1327002661 is an apocalyptic number.

It is an amenable number.

1327002661 is a deficient number, since it is larger than the sum of its proper divisors (30860571).

1327002661 is an equidigital number, since it uses as much as digits as its factorization.

1327002661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30860570.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 1327002661 is about 36428.0477242468. The cubic root of 1327002661 is about 1098.8977004483.

Adding to 1327002661 its reverse (1662007231), we get a palindrome (2989009892).

The spelling of 1327002661 in words is "one billion, three hundred twenty-seven million, two thousand, six hundred sixty-one".