667427389673 has 16 divisors (see below), whose sum is σ = 743658382080. Its totient is φ = 593791257600.

The previous prime is 667427389667. The next prime is 667427389691. The reversal of 667427389673 is 376983724766.

667427389673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 667427389673 - 2⁶ = 667427389609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667427386673) 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, 6734363 + ... + 6832751.

It is an arithmetic number, because the mean of its divisors is an integer number (46478648880).

Almost surely, 2^667427389673 is an apocalyptic number.

It is an amenable number.

667427389673 is a deficient number, since it is larger than the sum of its proper divisors (76230992407).

667427389673 is a wasteful number, since it uses less digits than its factorization.

667427389673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111568.

The product of its digits is 384072192, while the sum is 68.

The spelling of 667427389673 in words is "six hundred sixty-seven billion, four hundred twenty-seven million, three hundred eighty-nine thousand, six hundred seventy-three".