1671766361 has 2 divisors, whose sum is σ = 1671766362. Its totient is φ = 1671766360.

The previous prime is 1671766331. The next prime is 1671766363. The reversal of 1671766361 is 1636671761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1588500736 + 83265625 = 39856^2 + 9125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671766361 - 2¹⁴ = 1671749977 is a prime.

It is a Sophie Germain prime.

Together with 1671766363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1671766363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835883180 + 835883181.

It is an arithmetic number, because the mean of its divisors is an integer number (835883181).

Almost surely, 2^1671766361 is an apocalyptic number.

It is an amenable number.

1671766361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671766361 is an equidigital number, since it uses as much as digits as its factorization.

1671766361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 1671766361 is about 40887.2395864529. The cubic root of 1671766361 is about 1186.8391414483.

The spelling of 1671766361 in words is "one billion, six hundred seventy-one million, seven hundred sixty-six thousand, three hundred sixty-one".