20161666433235 has 16 divisors (see below), whose sum is σ = 32578059031200. Its totient is φ = 10646424518400.

The previous prime is 20161666433221. The next prime is 20161666433243. The reversal of 20161666433235 is 53233466616102.

It is not a de Polignac number, because 20161666433235 - 2¹⁷ = 20161666302163 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6654013810 + ... + 6654016839.

It is an arithmetic number, because the mean of its divisors is an integer number (2036128689450).

Almost surely, 2^{20161666433235} is an apocalyptic number.

20161666433235 is a deficient number, since it is larger than the sum of its proper divisors (12416392597965).

20161666433235 is a wasteful number, since it uses less digits than its factorization.

20161666433235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13308030758.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 20161666433235 in words is "twenty trillion, one hundred sixty-one billion, six hundred sixty-six million, four hundred thirty-three thousand, two hundred thirty-five".