666488 has 8 divisors (see below), whose sum is σ = 1249680. Its totient is φ = 333240.

The previous prime is 666467. The next prime is 666493. The reversal of 666488 is 884666.

666488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41648 + ... + 41663.

It is an arithmetic number, because the mean of its divisors is an integer number (156210).

2⁶⁶⁶⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

666488 is a deficient number, since it is larger than the sum of its proper divisors (583192).

666488 is a wasteful number, since it uses less digits than its factorization.

666488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83317 (or 83313 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 666488 is about 816.3871630544. The cubic root of 666488 is about 87.3502417909.

The spelling of 666488 in words is "six hundred sixty-six thousand, four hundred eighty-eight".