166477 has 4 divisors (see below), whose sum is σ = 167356. Its totient is φ = 165600.

The previous prime is 166471. The next prime is 166487. The reversal of 166477 is 774661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 84681 + 81796 = 291^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 166477 - 2⁷ = 166349 is a prime.

It is a Duffinian number.

166477 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166471) 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, 24 + ... + 577.

It is an arithmetic number, because the mean of its divisors is an integer number (41839).

2¹⁶⁶⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

166477 is a deficient number, since it is larger than the sum of its proper divisors (879).

166477 is an equidigital number, since it uses as much as digits as its factorization.

166477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878.

The product of its digits is 7056, while the sum is 31.

The square root of 166477 is about 408.0159310615. The cubic root of 166477 is about 55.0112373733.

The spelling of 166477 in words is "one hundred sixty-six thousand, four hundred seventy-seven".