666148 has 24 divisors (see below), whose sum is σ = 1370432. Its totient is φ = 277344.

The previous prime is 666143. The next prime is 666167. The reversal of 666148 is 841666.

It is not an unprimeable number, because it can be changed into a prime (666143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715 + ... + 1357.

2⁶⁶⁶¹⁴⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685216).

666148 is an abundant number, since it is smaller than the sum of its proper divisors (704284).

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

666148 is a wasteful number, since it uses less digits than its factorization.

666148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 689 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 666148 is about 816.1789019572. The cubic root of 666148 is about 87.3353857425.

The spelling of 666148 in words is "six hundred sixty-six thousand, one hundred forty-eight".