147666 has 8 divisors (see below), whose sum is σ = 295344. Its totient is φ = 49220.

The previous prime is 147661. The next prime is 147671. The reversal of 147666 is 666741.

It is an interprime number because it is at equal distance from previous prime (147661) and next prime (147671).

It is a sphenic number, since it is the product of 3 distinct primes.

147666 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (147661) by changing a digit.

147666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12300 + ... + 12311.

It is an arithmetic number, because the mean of its divisors is an integer number (36918).

2¹⁴⁷⁶⁶⁶ is an apocalyptic number.

147666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

147666 is a wasteful number, since it uses less digits than its factorization.

147666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24616.

The product of its digits is 6048, while the sum is 30.

The square root of 147666 is about 384.2733402150. The cubic root of 147666 is about 52.8559038285.

Adding to 147666 its sum of digits (30), we get a triangular number (147696 = T₅₄₃).

The spelling of 147666 in words is "one hundred forty-seven thousand, six hundred sixty-six".