166354 has 4 divisors (see below), whose sum is σ = 249534. Its totient is φ = 83176.

The previous prime is 166351. The next prime is 166357. The reversal of 166354 is 453661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 453661 = 13 ⋅34897.

It is an interprime number because it is at equal distance from previous prime (166351) and next prime (166357).

It can be written as a sum of positive squares in only one way, i.e., 139129 + 27225 = 373^2 + 165^2 .

It is not an unprimeable number, because it can be changed into a prime (166351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41587 + ... + 41590.

2¹⁶⁶³⁵⁴ is an apocalyptic number.

166354 is a deficient number, since it is larger than the sum of its proper divisors (83180).

166354 is an equidigital number, since it uses as much as digits as its factorization.

166354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83179.

The product of its digits is 2160, while the sum is 25.

The square root of 166354 is about 407.8651738013. The cubic root of 166354 is about 54.9976858530.

The spelling of 166354 in words is "one hundred sixty-six thousand, three hundred fifty-four".