163503197666 has 8 divisors (see below), whose sum is σ = 245901907920. Its totient is φ = 81535895028.

The previous prime is 163503197651. The next prime is 163503197681. The reversal of 163503197666 is 666791305361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (163503197651) and next prime (163503197681).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107850956 + ... + 107852471.

It is an arithmetic number, because the mean of its divisors is an integer number (30737738490).

Almost surely, 2^163503197666 is an apocalyptic number.

163503197666 is a deficient number, since it is larger than the sum of its proper divisors (82398710254).

163503197666 is a wasteful number, since it uses less digits than its factorization.

163503197666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215703808.

The product of its (nonzero) digits is 3674160, while the sum is 53.

The spelling of 163503197666 in words is "one hundred sixty-three billion, five hundred three million, one hundred ninety-seven thousand, six hundred sixty-six".