667309044 has 24 divisors (see below), whose sum is σ = 1575816480. Its totient is φ = 219756064.

The previous prime is 667309039. The next prime is 667309099. The reversal of 667309044 is 440903766.

It is a junction number, because it is equal to n+sod(n) for n = 667308993 and 667309011.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 333999 + ... + 335990.

It is an arithmetic number, because the mean of its divisors is an integer number (65659020).

Almost surely, 2^667309044 is an apocalyptic number.

It is an amenable number.

667309044 is an abundant number, since it is smaller than the sum of its proper divisors (908507436).

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

667309044 is a wasteful number, since it uses less digits than its factorization.

667309044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670079 (or 670077 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 667309044 is about 25832.3255631389. The cubic root of 667309044 is about 873.8609588088.

The spelling of 667309044 in words is "six hundred sixty-seven million, three hundred nine thousand, forty-four".