1002160661 has 4 divisors (see below), whose sum is σ = 1004891712. Its totient is φ = 999429612.

The previous prime is 1002160639. The next prime is 1002160667. The reversal of 1002160661 is 1660612001.

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: 1660612001 = 709 ⋅2342189.

It is a cyclic number.

It is not a de Polignac number, because 1002160661 - 2⁶ = 1002160597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002160667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364975 + ... + 1365708.

It is an arithmetic number, because the mean of its divisors is an integer number (251222928).

Almost surely, 2^1002160661 is an apocalyptic number.

It is an amenable number.

1002160661 is a deficient number, since it is larger than the sum of its proper divisors (2731051).

1002160661 is an equidigital number, since it uses as much as digits as its factorization.

1002160661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731050.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1002160661 is about 31656.9212179580. The cubic root of 1002160661 is about 1000.7197022378.

Adding to 1002160661 its reverse (1660612001), we get a palindrome (2662772662).

The spelling of 1002160661 in words is "one billion, two million, one hundred sixty thousand, six hundred sixty-one".