845605667 has 2 divisors, whose sum is σ = 845605668. Its totient is φ = 845605666.

The previous prime is 845605639. The next prime is 845605679. The reversal of 845605667 is 766506548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845605667 - 2¹⁶ = 845540131 is a prime.

It is not a weakly prime, because it can be changed into another prime (845605627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422802833 + 422802834.

It is an arithmetic number, because the mean of its divisors is an integer number (422802834).

Almost surely, 2^845605667 is an apocalyptic number.

845605667 is a deficient number, since it is larger than the sum of its proper divisors (1).

845605667 is an equidigital number, since it uses as much as digits as its factorization.

845605667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The square root of 845605667 is about 29079.2996304932. The cubic root of 845605667 is about 945.6330191295.

The spelling of 845605667 in words is "eight hundred forty-five million, six hundred five thousand, six hundred sixty-seven".