1671660671 has 2 divisors, whose sum is σ = 1671660672. Its totient is φ = 1671660670.

The previous prime is 1671660667. The next prime is 1671660673. The reversal of 1671660671 is 1760661761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1671660671 - 2² = 1671660667 is a prime.

Together with 1671660673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671660673) 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 as a sum of consecutive naturals, namely, 835830335 + 835830336.

It is an arithmetic number, because the mean of its divisors is an integer number (835830336).

Almost surely, 2^1671660671 is an apocalyptic number.

1671660671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671660671 is an equidigital number, since it uses as much as digits as its factorization.

1671660671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1671660671 is about 40885.9471090007. The cubic root of 1671660671 is about 1186.8141300441.

The spelling of 1671660671 in words is "one billion, six hundred seventy-one million, six hundred sixty thousand, six hundred seventy-one".