665846383 has 2 divisors, whose sum is σ = 665846384. Its totient is φ = 665846382.

The previous prime is 665846381. The next prime is 665846479. The reversal of 665846383 is 383648566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665846383 - 2¹ = 665846381 is a prime.

Together with 665846381, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665846381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332923191 + 332923192.

It is an arithmetic number, because the mean of its divisors is an integer number (332923192).

Almost surely, 2^665846383 is an apocalyptic number.

665846383 is a deficient number, since it is larger than the sum of its proper divisors (1).

665846383 is an equidigital number, since it uses as much as digits as its factorization.

665846383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 49.

The square root of 665846383 is about 25803.9993605642. Note that the first 3 decimals coincide. The cubic root of 665846383 is about 873.2220257919. Note that the first 3 decimals are identical.

The spelling of 665846383 in words is "six hundred sixty-five million, eight hundred forty-six thousand, three hundred eighty-three".