165061651 has 2 divisors, whose sum is σ = 165061652. Its totient is φ = 165061650.

The previous prime is 165061571. The next prime is 165061667. The reversal of 165061651 is 156160561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165061651 - 2¹⁹ = 164537363 is a prime.

It is not a weakly prime, because it can be changed into another prime (165061681) 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, 82530825 + 82530826.

It is an arithmetic number, because the mean of its divisors is an integer number (82530826).

Almost surely, 2^165061651 is an apocalyptic number.

165061651 is a deficient number, since it is larger than the sum of its proper divisors (1).

165061651 is an equidigital number, since it uses as much as digits as its factorization.

165061651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 165061651 is about 12847.6321164641. The cubic root of 165061651 is about 548.5489586175.

The spelling of 165061651 in words is "one hundred sixty-five million, sixty-one thousand, six hundred fifty-one".