165146643 has 6 divisors (see below), whose sum is σ = 238545164. Its totient is φ = 110097756.

The previous prime is 165146629. The next prime is 165146711. The reversal of 165146643 is 346641561.

It is a happy number.

165146643 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 4 + 6 + 643 = 666.

It is not a de Polignac number, because 165146643 - 2⁴ = 165146627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165146598 and 165146607.

It is not an unprimeable number, because it can be changed into a prime (165146623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9174805 + ... + 9174822.

Almost surely, 2^165146643 is an apocalyptic number.

165146643 is a deficient number, since it is larger than the sum of its proper divisors (73398521).

165146643 is a wasteful number, since it uses less digits than its factorization.

165146643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18349633 (or 18349630 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 165146643 is about 12850.9393820063. The cubic root of 165146643 is about 548.6430936937.

The spelling of 165146643 in words is "one hundred sixty-five million, one hundred forty-six thousand, six hundred forty-three".