165043663 has 2 divisors, whose sum is σ = 165043664. Its totient is φ = 165043662.

The previous prime is 165043661. The next prime is 165043679. The reversal of 165043663 is 366340561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165043663 - 2¹ = 165043661 is a prime.

Together with 165043661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165043661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82521831 + 82521832.

It is an arithmetic number, because the mean of its divisors is an integer number (82521832).

Almost surely, 2^165043663 is an apocalyptic number.

165043663 is a deficient number, since it is larger than the sum of its proper divisors (1).

165043663 is an equidigital number, since it uses as much as digits as its factorization.

165043663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 165043663 is about 12846.9320462124. The cubic root of 165043663 is about 548.5290314023.

The spelling of 165043663 in words is "one hundred sixty-five million, forty-three thousand, six hundred sixty-three".