166204543 has 8 divisors (see below), whose sum is σ = 167756400. Its totient is φ = 164659968.

The previous prime is 166204541. The next prime is 166204567. The reversal of 166204543 is 345402661.

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

It is a cyclic number.

It is not a de Polignac number, because 166204543 - 2¹ = 166204541 is a prime.

It is a super-2 number, since 2×166204543² = 55247900227677698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166204541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50863 + ... + 54031.

It is an arithmetic number, because the mean of its divisors is an integer number (20969550).

Almost surely, 2^166204543 is an apocalyptic number.

166204543 is a deficient number, since it is larger than the sum of its proper divisors (1551857).

166204543 is a wasteful number, since it uses less digits than its factorization.

166204543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 166204543 is about 12892.0340908640. The cubic root of 166204543 is about 549.8121044119.

The spelling of 166204543 in words is "one hundred sixty-six million, two hundred four thousand, five hundred forty-three".