666748 has 24 divisors (see below), whose sum is σ = 1272320. Its totient is φ = 304560.

The previous prime is 666737. The next prime is 666749. The reversal of 666748 is 847666.

666748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2215 + ... + 2497.

2⁶⁶⁶⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

666748 is a deficient number, since it is larger than the sum of its proper divisors (605572).

666748 is a wasteful number, since it uses less digits than its factorization.

666748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 335 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 666748 is about 816.5463857002. The cubic root of 666748 is about 87.3615988897.

The spelling of 666748 in words is "six hundred sixty-six thousand, seven hundred forty-eight".