163403665 has 8 divisors (see below), whose sum is σ = 196496640. Its totient is φ = 130448112.

The previous prime is 163403633. The next prime is 163403671. The reversal of 163403665 is 566304361.

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 163403665 - 2⁵ = 163403633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163403665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31719 + ... + 36508.

It is an arithmetic number, because the mean of its divisors is an integer number (24562080).

Almost surely, 2^163403665 is an apocalyptic number.

It is an amenable number.

163403665 is a deficient number, since it is larger than the sum of its proper divisors (33092975).

163403665 is an equidigital number, since it uses as much as digits as its factorization.

163403665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68711.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 163403665 is about 12782.9443009035. The cubic root of 163403665 is about 546.7061143373.

The spelling of 163403665 in words is "one hundred sixty-three million, four hundred three thousand, six hundred sixty-five".