166405065434 has 8 divisors (see below), whose sum is σ = 249609331380. Its totient is φ = 83201954976.

The previous prime is 166405065401. The next prime is 166405065457. The reversal of 166405065434 is 434560504661.

It can be written as a sum of positive squares in 2 ways, for example, as 161214295225 + 5190770209 = 401515^2 + 72047^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394262 + ... + 698750.

Almost surely, 2^166405065434 is an apocalyptic number.

166405065434 is a deficient number, since it is larger than the sum of its proper divisors (83204265946).

166405065434 is a wasteful number, since it uses less digits than its factorization.

166405065434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577744.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 166405065434 in words is "one hundred sixty-six billion, four hundred five million, sixty-five thousand, four hundred thirty-four".