667475738 has 8 divisors (see below), whose sum is σ = 1053909120. Its totient is φ = 316172700.

The previous prime is 667475723. The next prime is 667475759. The reversal of 667475738 is 837574766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 667475738.

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 3 ways as a sum of consecutive naturals, for example, 8782538 + ... + 8782613.

It is an arithmetic number, because the mean of its divisors is an integer number (131738640).

Almost surely, 2^667475738 is an apocalyptic number.

667475738 is a deficient number, since it is larger than the sum of its proper divisors (386433382).

667475738 is a wasteful number, since it uses less digits than its factorization.

667475738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17565172.

The product of its digits is 5927040, while the sum is 53.

The square root of 667475738 is about 25835.5518230209. The cubic root of 667475738 is about 873.9337163276.

The spelling of 667475738 in words is "six hundred sixty-seven million, four hundred seventy-five thousand, seven hundred thirty-eight".