166666436573 has 16 divisors (see below), whose sum is σ = 205986224640. Its totient is φ = 131316183936.

The previous prime is 166666436549. The next prime is 166666436597. The reversal of 166666436573 is 375634666661.

It is an interprime number because it is at equal distance from previous prime (166666436549) and next prime (166666436597).

It is not a de Polignac number, because 166666436573 - 2¹⁴ = 166666420189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166666436513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3809840 + ... + 3853337.

It is an arithmetic number, because the mean of its divisors is an integer number (12874139040).

Almost surely, 2^166666436573 is an apocalyptic number.

166666436573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

166666436573 is a deficient number, since it is larger than the sum of its proper divisors (39319788067).

166666436573 is a wasteful number, since it uses less digits than its factorization.

166666436573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7663436.

The product of its digits is 58786560, while the sum is 59.

The spelling of 166666436573 in words is "one hundred sixty-six billion, six hundred sixty-six million, four hundred thirty-six thousand, five hundred seventy-three".