1002166161 has 4 divisors (see below), whose sum is σ = 1336221552. Its totient is φ = 668110772.

The previous prime is 1002166159. The next prime is 1002166163. The reversal of 1002166161 is 1616612001.

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 an interprime number because it is at equal distance from previous prime (1002166159) and next prime (1002166163).

It is a cyclic number.

It is not a de Polignac number, because 1002166161 - 2¹ = 1002166159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002166163) 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, 167027691 + ... + 167027696.

It is an arithmetic number, because the mean of its divisors is an integer number (334055388).

Almost surely, 2^1002166161 is an apocalyptic number.

It is an amenable number.

1002166161 is a deficient number, since it is larger than the sum of its proper divisors (334055391).

1002166161 is an equidigital number, since it uses as much as digits as its factorization.

1002166161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334055390.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1002166161 is about 31657.0080866781. The cubic root of 1002166161 is about 1000.7215329317.

Adding to 1002166161 its reverse (1616612001), we get a palindrome (2618778162).

The spelling of 1002166161 in words is "one billion, two million, one hundred sixty-six thousand, one hundred sixty-one".