845666959 has 2 divisors, whose sum is σ = 845666960. Its totient is φ = 845666958.

The previous prime is 845666957. The next prime is 845667007. The reversal of 845666959 is 959666548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845666959 - 2¹ = 845666957 is a prime.

Together with 845666957, 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 (845666951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422833479 + 422833480.

It is an arithmetic number, because the mean of its divisors is an integer number (422833480).

Almost surely, 2^845666959 is an apocalyptic number.

845666959 is a deficient number, since it is larger than the sum of its proper divisors (1).

845666959 is an equidigital number, since it uses as much as digits as its factorization.

845666959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13996800, while the sum is 58.

The square root of 845666959 is about 29080.3534882229. The cubic root of 845666959 is about 945.6558660036.

The spelling of 845666959 in words is "eight hundred forty-five million, six hundred sixty-six thousand, nine hundred fifty-nine".