667472 has 20 divisors (see below), whose sum is σ = 1393140. Its totient is φ = 307968.

The previous prime is 667463. The next prime is 667477. The reversal of 667472 is 274766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 226576 + 440896 = 476^2 + 664^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667477) by changing a digit.

667472 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, 1397 + ... + 1812.

It is an arithmetic number, because the mean of its divisors is an integer number (69657).

2⁶⁶⁷⁴⁷² is an apocalyptic number.

It is an amenable number.

667472 is an abundant number, since it is smaller than the sum of its proper divisors (725668).

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

667472 is a wasteful number, since it uses less digits than its factorization.

667472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230 (or 3224 counting only the distinct ones).

The product of its digits is 14112, while the sum is 32.

The square root of 667472 is about 816.9895960170. The cubic root of 667472 is about 87.3932084922.

The spelling of 667472 in words is "six hundred sixty-seven thousand, four hundred seventy-two".