667673572 has 12 divisors (see below), whose sum is σ = 1237159980. Its totient is φ = 314199296.

The previous prime is 667673569. The next prime is 667673579. The reversal of 667673572 is 275376766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 214153956 + 453519616 = 14634^2 + 21296^2 .

It is a super-3 number, since 3×667673572³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (667673579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4909297 + ... + 4909432.

It is an arithmetic number, because the mean of its divisors is an integer number (103096665).

Almost surely, 2^667673572 is an apocalyptic number.

It is an amenable number.

667673572 is a deficient number, since it is larger than the sum of its proper divisors (569486408).

667673572 is a wasteful number, since it uses less digits than its factorization.

667673572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9818750 (or 9818748 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 49.

The square root of 667673572 is about 25839.3802557259. The cubic root of 667673572 is about 874.0200499147.

The spelling of 667673572 in words is "six hundred sixty-seven million, six hundred seventy-three thousand, five hundred seventy-two".