666472 has 16 divisors (see below), whose sum is σ = 1258560. Its totient is φ = 330864.

The previous prime is 666467. The next prime is 666493. The reversal of 666472 is 274666.

It is an Ulam number.

It is an unprimeable number.

666472 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, 1633 + ... + 1999.

It is an arithmetic number, because the mean of its divisors is an integer number (78660).

2⁶⁶⁶⁴⁷² is an apocalyptic number.

It is an amenable number.

666472 is a deficient number, since it is larger than the sum of its proper divisors (592088).

666472 is a wasteful number, since it uses less digits than its factorization.

666472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 596 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 666472 is about 816.3773637234. The cubic root of 666472 is about 87.3495427960.

The spelling of 666472 in words is "six hundred sixty-six thousand, four hundred seventy-two".