163665343 has 8 divisors (see below), whose sum is σ = 166350816. Its totient is φ = 160992000.

The previous prime is 163665331. The next prime is 163665347. The reversal of 163665343 is 343566361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163665343 - 2⁵ = 163665311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163665347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26478 + ... + 32068.

It is an arithmetic number, because the mean of its divisors is an integer number (20793852).

Almost surely, 2^163665343 is an apocalyptic number.

163665343 is a deficient number, since it is larger than the sum of its proper divisors (2685473).

163665343 is an equidigital number, since it uses as much as digits as its factorization.

163665343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065.

The product of its digits is 116640, while the sum is 37.

The square root of 163665343 is about 12793.1756417240. The cubic root of 163665343 is about 546.9977941751.

The spelling of 163665343 in words is "one hundred sixty-three million, six hundred sixty-five thousand, three hundred forty-three".