667474 has 4 divisors (see below), whose sum is σ = 1001214. Its totient is φ = 333736.

The previous prime is 667463. The next prime is 667477. The reversal of 667474 is 474766.

667474 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 664225 + 3249 = 815^2 + 57^2 .

It is an Ulam number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166867 + ... + 166870.

2⁶⁶⁷⁴⁷⁴ is an apocalyptic number.

667474 is a deficient number, since it is larger than the sum of its proper divisors (333740).

667474 is a wasteful number, since it uses less digits than its factorization.

667474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333739.

The product of its digits is 28224, while the sum is 34.

The square root of 667474 is about 816.9908200219. The cubic root of 667474 is about 87.3932957799.

The spelling of 667474 in words is "six hundred sixty-seven thousand, four hundred seventy-four".