20161666433164 has 6 divisors (see below), whose sum is σ = 35282916258044. Its totient is φ = 10080833216580.

The previous prime is 20161666433119. The next prime is 20161666433197. The reversal of 20161666433164 is 46133466616102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2520208304142 + ... + 2520208304149.

Almost surely, 2^{20161666433164} is an apocalyptic number.

It is an amenable number.

20161666433164 is a deficient number, since it is larger than the sum of its proper divisors (15121249824880).

20161666433164 is a wasteful number, since it uses less digits than its factorization.

20161666433164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040416608295 (or 5040416608293 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 49.

The spelling of 20161666433164 in words is "twenty trillion, one hundred sixty-one billion, six hundred sixty-six million, four hundred thirty-three thousand, one hundred sixty-four".