165662663 has 2 divisors, whose sum is σ = 165662664. Its totient is φ = 165662662.

The previous prime is 165662621. The next prime is 165662681. The reversal of 165662663 is 366266561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165662663 - 2⁶ = 165662599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165662663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165662863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82831331 + 82831332.

It is an arithmetic number, because the mean of its divisors is an integer number (82831332).

Almost surely, 2^165662663 is an apocalyptic number.

165662663 is a deficient number, since it is larger than the sum of its proper divisors (1).

165662663 is an equidigital number, since it uses as much as digits as its factorization.

165662663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The square root of 165662663 is about 12871.0008546344. Note that the first 3 decimals coincide. The cubic root of 165662663 is about 549.2139327249.

The spelling of 165662663 in words is "one hundred sixty-five million, six hundred sixty-two thousand, six hundred sixty-three".