667481572 has 12 divisors (see below), whose sum is σ = 1168634236. Its totient is φ = 333586080.

The previous prime is 667481569. The next prime is 667481611. The reversal of 667481572 is 275184766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 497022436 + 170459136 = 22294^2 + 13056^2 .

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, 28683 + ... + 46450.

Almost surely, 2^667481572 is an apocalyptic number.

It is an amenable number.

667481572 is a deficient number, since it is larger than the sum of its proper divisors (501152664).

667481572 is a wasteful number, since it uses less digits than its factorization.

667481572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77358 (or 77356 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 667481572 is about 25835.6647292072. The cubic root of 667481572 is about 873.9362624948.

The spelling of 667481572 in words is "six hundred sixty-seven million, four hundred eighty-one thousand, five hundred seventy-two".