165961267 has 2 divisors, whose sum is σ = 165961268. Its totient is φ = 165961266.

The previous prime is 165961249. The next prime is 165961273. The reversal of 165961267 is 762169561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165961267 - 2⁷ = 165961139 is a prime.

It is not a weakly prime, because it can be changed into another prime (165961207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82980633 + 82980634.

It is an arithmetic number, because the mean of its divisors is an integer number (82980634).

Almost surely, 2^165961267 is an apocalyptic number.

165961267 is a deficient number, since it is larger than the sum of its proper divisors (1).

165961267 is an equidigital number, since it uses as much as digits as its factorization.

165961267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 165961267 is about 12882.5955071173. The cubic root of 165961267 is about 549.5437174383.

It can be divided in two parts, 1659 and 61267, that added together give a palindrome (62926).

The spelling of 165961267 in words is "one hundred sixty-five million, nine hundred sixty-one thousand, two hundred sixty-seven".