195667651 has 2 divisors, whose sum is σ = 195667652. Its totient is φ = 195667650.

The previous prime is 195667649. The next prime is 195667699. The reversal of 195667651 is 156766591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195667651 - 2¹ = 195667649 is a prime.

Together with 195667649, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195667751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97833825 + 97833826.

It is an arithmetic number, because the mean of its divisors is an integer number (97833826).

Almost surely, 2^195667651 is an apocalyptic number.

195667651 is a deficient number, since it is larger than the sum of its proper divisors (1).

195667651 is an equidigital number, since it uses as much as digits as its factorization.

195667651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 46.

The square root of 195667651 is about 13988.1253568875. The cubic root of 195667651 is about 580.5500637748.

The spelling of 195667651 in words is "one hundred ninety-five million, six hundred sixty-seven thousand, six hundred fifty-one".