667744434 has 48 divisors (see below), whose sum is σ = 1656787392. Its totient is φ = 190400544.

The previous prime is 667744423. The next prime is 667744447. The reversal of 667744434 is 434447766.

It is a self number, because there is not a number n which added to its sum of digits gives 667744434.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60832 + ... + 70964.

It is an arithmetic number, because the mean of its divisors is an integer number (34516404).

Almost surely, 2^667744434 is an apocalyptic number.

667744434 is an abundant number, since it is smaller than the sum of its proper divisors (989042958).

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

667744434 is a wasteful number, since it uses less digits than its factorization.

667744434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10671 (or 10668 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 45.

The square root of 667744434 is about 25840.7514209630. The cubic root of 667744434 is about 874.0509695239.

The spelling of 667744434 in words is "six hundred sixty-seven million, seven hundred forty-four thousand, four hundred thirty-four".