1361666171 has 4 divisors (see below), whose sum is σ = 1420869072. Its totient is φ = 1302463272.

The previous prime is 1361666161. The next prime is 1361666183. The reversal of 1361666171 is 1716661631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361666171 is a prime.

It is a super-2 number, since 2×1361666171² = 3708269522491602482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361666161) 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, 29601416 + ... + 29601461.

It is an arithmetic number, because the mean of its divisors is an integer number (355217268).

Almost surely, 2^1361666171 is an apocalyptic number.

1361666171 is a deficient number, since it is larger than the sum of its proper divisors (59202901).

1361666171 is an equidigital number, since it uses as much as digits as its factorization.

1361666171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59202900.

The product of its digits is 27216, while the sum is 38.

The square root of 1361666171 is about 36900.7611168117. The cubic root of 1361666171 is about 1108.3839185661.

The spelling of 1361666171 in words is "one billion, three hundred sixty-one million, six hundred sixty-six thousand, one hundred seventy-one".