667471 has 16 divisors (see below), whose sum is σ = 829440. Its totient is φ = 524160.

The previous prime is 667463. The next prime is 667477. The reversal of 667471 is 174766.

It is not a de Polignac number, because 667471 - 2³ = 667463 is a prime.

It is a super-3 number, since 3×667471³ = 892110105495984333, which contains 333 as substring.

It is a Duffinian 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.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8410 + ... + 8488.

It is an arithmetic number, because the mean of its divisors is an integer number (51840).

2⁶⁶⁷⁴⁷¹ is an apocalyptic number.

667471 is a deficient number, since it is larger than the sum of its proper divisors (161969).

667471 is a wasteful number, since it uses less digits than its factorization.

667471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174.

The product of its digits is 7056, while the sum is 31.

The square root of 667471 is about 816.9889840139. The cubic root of 667471 is about 87.3931648483.

The spelling of 667471 in words is "six hundred sixty-seven thousand, four hundred seventy-one".