166196404593 has 24 divisors (see below), whose sum is σ = 241832645600. Its totient is φ = 109980431424.

The previous prime is 166196404579. The next prime is 166196404663. The reversal of 166196404593 is 395404691661.

It is a happy number.

166196404593 is a `hidden beast` number, since 1 + 6 + 6 + 1 + 9 + 6 + 40 + 4 + 593 = 666.

It is not a de Polignac number, because 166196404593 - 2¹⁸ = 166196142449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166196405593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10471698 + ... + 10487556.

Almost surely, 2^166196404593 is an apocalyptic number.

It is an amenable number.

166196404593 is a deficient number, since it is larger than the sum of its proper divisors (75636241007).

166196404593 is a wasteful number, since it uses less digits than its factorization.

166196404593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24381 (or 24378 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 166196404593 in words is "one hundred sixty-six billion, one hundred ninety-six million, four hundred four thousand, five hundred ninety-three".