666470 has 16 divisors (see below), whose sum is σ = 1371168. Its totient is φ = 228480.

The previous prime is 666467. The next prime is 666493. The reversal of 666470 is 74666.

666470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4691 + ... + 4830.

It is an arithmetic number, because the mean of its divisors is an integer number (85698).

2⁶⁶⁶⁴⁷⁰ is an apocalyptic number.

666470 is an abundant number, since it is smaller than the sum of its proper divisors (704698).

It is a weird number, because it is abundant, but not a pseudoperfect number.

666470 is a wasteful number, since it uses less digits than its factorization.

666470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 666470 is about 816.3761387988. The cubic root of 666470 is about 87.3494554209.

The spelling of 666470 in words is "six hundred sixty-six thousand, four hundred seventy".