163965290763666 has 64 divisors (see below), whose sum is σ = 384326665021440. Its totient is φ = 45668446158720.

The previous prime is 163965290763661. The next prime is 163965290763667. The reversal of 163965290763666 is 666367092569361.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163965290763661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308639136 + ... + 309169931.

It is an arithmetic number, because the mean of its divisors is an integer number (6005104140960).

Almost surely, 2^{163965290763666} is an apocalyptic number.

163965290763666 is an abundant number, since it is smaller than the sum of its proper divisors (220361374257774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163965290763666 is a wasteful number, since it uses less digits than its factorization.

163965290763666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617809239.

The product of its (nonzero) digits is 2380855680, while the sum is 75.

The spelling of 163965290763666 in words is "one hundred sixty-three trillion, nine hundred sixty-five billion, two hundred ninety million, seven hundred sixty-three thousand, six hundred sixty-six".