158665643 has 2 divisors, whose sum is σ = 158665644. Its totient is φ = 158665642.

The previous prime is 158665609. The next prime is 158665649. The reversal of 158665643 is 346566851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 158665643 - 2¹⁶ = 158600107 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 158665594 and 158665603.

It is not a weakly prime, because it can be changed into another prime (158665649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79332821 + 79332822.

It is an arithmetic number, because the mean of its divisors is an integer number (79332822).

Almost surely, 2^158665643 is an apocalyptic number.

158665643 is a deficient number, since it is larger than the sum of its proper divisors (1).

158665643 is an equidigital number, since it uses as much as digits as its factorization.

158665643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 44.

The square root of 158665643 is about 12596.2551180897. The cubic root of 158665643 is about 541.3701408603.

The spelling of 158665643 in words is "one hundred fifty-eight million, six hundred sixty-five thousand, six hundred forty-three".