201685667 has 2 divisors, whose sum is σ = 201685668. Its totient is φ = 201685666.

The previous prime is 201685661. The next prime is 201685681. The reversal of 201685667 is 766586102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201685667 - 2¹⁰ = 201684643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201685661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100842833 + 100842834.

It is an arithmetic number, because the mean of its divisors is an integer number (100842834).

Almost surely, 2^201685667 is an apocalyptic number.

201685667 is a deficient number, since it is larger than the sum of its proper divisors (1).

201685667 is an equidigital number, since it uses as much as digits as its factorization.

201685667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 201685667 is about 14201.6079019243. The cubic root of 201685667 is about 586.4419266946.

The spelling of 201685667 in words is "two hundred one million, six hundred eighty-five thousand, six hundred sixty-seven".