166536541605 has 64 divisors (see below), whose sum is σ = 306137825280. Its totient is φ = 75728100096.

The previous prime is 166536541583. The next prime is 166536541649. The reversal of 166536541605 is 506145635661.

It is not a de Polignac number, because 166536541605 - 2²⁵ = 166502987173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41746951 + ... + 41750939.

It is an arithmetic number, because the mean of its divisors is an integer number (4783403520).

Almost surely, 2^166536541605 is an apocalyptic number.

166536541605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166536541605 is a deficient number, since it is larger than the sum of its proper divisors (139601283675).

166536541605 is a wasteful number, since it uses less digits than its factorization.

166536541605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 166536541605 in words is "one hundred sixty-six billion, five hundred thirty-six million, five hundred forty-one thousand, six hundred five".