667422 has 24 divisors (see below), whose sum is σ = 1652976. Its totient is φ = 190656.

The previous prime is 667421. The next prime is 667423. The reversal of 667422 is 224766.

It is an interprime number because it is at equal distance from previous prime (667421) and next prime (667423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667421) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2523 + ... + 2774.

It is an arithmetic number, because the mean of its divisors is an integer number (68874).

2⁶⁶⁷⁴²² is an apocalyptic number.

667422 is an abundant number, since it is smaller than the sum of its proper divisors (985554).

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

667422 is a wasteful number, since it uses less digits than its factorization.

667422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312 (or 5309 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 667422 is about 816.9589952990. The cubic root of 667422 is about 87.3910262436.

It can be divided in two parts, 667 and 422, that added together give a square (1089 = 33²).

The spelling of 667422 in words is "six hundred sixty-seven thousand, four hundred twenty-two".