667422644 has 48 divisors (see below), whose sum is σ = 1359912960. Its totient is φ = 280700640.

The previous prime is 667422631. The next prime is 667422673. The reversal of 667422644 is 446224766.

667422644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672989 + ... + 673979.

It is an arithmetic number, because the mean of its divisors is an integer number (28331520).

Almost surely, 2^667422644 is an apocalyptic number.

It is an amenable number.

667422644 is an abundant number, since it is smaller than the sum of its proper divisors (692490316).

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

667422644 is a wasteful number, since it uses less digits than its factorization.

667422644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428 (or 1426 counting only the distinct ones).

The product of its digits is 387072, while the sum is 41.

The square root of 667422644 is about 25834.5242650218. The cubic root of 667422644 is about 873.9105435168.

The spelling of 667422644 in words is "six hundred sixty-seven million, four hundred twenty-two thousand, six hundred forty-four".