166273541 has 8 divisors (see below), whose sum is σ = 200028480. Its totient is φ = 135019008.

The previous prime is 166273531. The next prime is 166273543. The reversal of 166273541 is 145372661.

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 166273541 - 2¹⁰ = 166272517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166273543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624956 + ... + 625221.

It is an arithmetic number, because the mean of its divisors is an integer number (25003560).

Almost surely, 2^166273541 is an apocalyptic number.

It is an amenable number.

166273541 is a deficient number, since it is larger than the sum of its proper divisors (33754939).

166273541 is a wasteful number, since it uses less digits than its factorization.

166273541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250203.

The product of its digits is 30240, while the sum is 35.

The square root of 166273541 is about 12894.7098067386. The cubic root of 166273541 is about 549.8881767152. Note that the first 3 decimals are identical.

The spelling of 166273541 in words is "one hundred sixty-six million, two hundred seventy-three thousand, five hundred forty-one".