166737 has 4 divisors (see below), whose sum is σ = 222320. Its totient is φ = 111156.

The previous prime is 166723. The next prime is 166739. The reversal of 166737 is 737661.

166737 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 166737 - 2⁷ = 166609 is a prime.

It is a D-number.

It is a Duffinian number.

166737 is strictly pandigital in base 7.

It is not an unprimeable number, because it can be changed into a prime (166739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27787 + ... + 27792.

It is an arithmetic number, because the mean of its divisors is an integer number (55580).

2¹⁶⁶⁷³⁷ is an apocalyptic number.

It is an amenable number.

166737 is a deficient number, since it is larger than the sum of its proper divisors (55583).

166737 is an equidigital number, since it uses as much as digits as its factorization.

166737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55582.

The product of its digits is 5292, while the sum is 30.

The square root of 166737 is about 408.3344217673. The cubic root of 166737 is about 55.0398609112.

It can be divided in two parts, 166 and 737, that added together give a triangular number (903 = T₄₂).

The spelling of 166737 in words is "one hundred sixty-six thousand, seven hundred thirty-seven".