163343566 has 4 divisors (see below), whose sum is σ = 245015352. Its totient is φ = 81671782.

The previous prime is 163343533. The next prime is 163343581. The reversal of 163343566 is 665343361.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×163343566² = 53362241107192712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40835890 + ... + 40835893.

It is an arithmetic number, because the mean of its divisors is an integer number (61253838).

Almost surely, 2^163343566 is an apocalyptic number.

163343566 is a deficient number, since it is larger than the sum of its proper divisors (81671786).

163343566 is an equidigital number, since it uses as much as digits as its factorization.

163343566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81671785.

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

The square root of 163343566 is about 12780.5933352094. The cubic root of 163343566 is about 546.6390809168.

It can be divided in two parts, 16334 and 3566, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 163343566 in words is "one hundred sixty-three million, three hundred forty-three thousand, five hundred sixty-six".