667481673 has 16 divisors (see below), whose sum is σ = 898413120. Its totient is φ = 440783616.

The previous prime is 667481663. The next prime is 667481687. The reversal of 667481673 is 376184766.

It is not a de Polignac number, because 667481673 - 2⁴ = 667481657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667481663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223333 + ... + 226301.

It is an arithmetic number, because the mean of its divisors is an integer number (56150820).

Almost surely, 2^667481673 is an apocalyptic number.

It is an amenable number.

667481673 is a deficient number, since it is larger than the sum of its proper divisors (230931447).

667481673 is a wasteful number, since it uses less digits than its factorization.

667481673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656.

The product of its digits is 1016064, while the sum is 48.

The square root of 667481673 is about 25835.6666838694. Note that the first 4 decimals coincide. The cubic root of 667481673 is about 873.9363065747.

The spelling of 667481673 in words is "six hundred sixty-seven million, four hundred eighty-one thousand, six hundred seventy-three".