166043437 has 8 divisors (see below), whose sum is σ = 200926656. Its totient is φ = 133950912.

The previous prime is 166043431. The next prime is 166043459. The reversal of 166043437 is 734340661.

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 166043437 - 2³ = 166043429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166043431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697543 + ... + 697780.

It is an arithmetic number, because the mean of its divisors is an integer number (25115832).

Almost surely, 2^166043437 is an apocalyptic number.

166043437 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

166043437 is a deficient number, since it is larger than the sum of its proper divisors (34883219).

166043437 is a wasteful number, since it uses less digits than its factorization.

166043437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395347.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 166043437 is about 12885.7842989862. The cubic root of 166043437 is about 549.6343983497.

The spelling of 166043437 in words is "one hundred sixty-six million, forty-three thousand, four hundred thirty-seven".