667452 has 12 divisors (see below), whose sum is σ = 1557416. Its totient is φ = 222480.

The previous prime is 667441. The next prime is 667463. The reversal of 667452 is 254766.

It is an interprime number because it is at equal distance from previous prime (667441) and next prime (667463).

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

667452 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27799 + ... + 27822.

2⁶⁶⁷⁴⁵² is an apocalyptic number.

It is an amenable number.

667452 is an abundant number, since it is smaller than the sum of its proper divisors (889964).

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

667452 is a wasteful number, since it uses less digits than its factorization.

667452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55628 (or 55626 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 667452 is about 816.9773558673. The cubic root of 667452 is about 87.3923356059.

Subtracting from 667452 its reverse (254766), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 667452 in words is "six hundred sixty-seven thousand, four hundred fifty-two".