667231045042 has 4 divisors (see below), whose sum is σ = 1000846567566. Its totient is φ = 333615522520.

The previous prime is 667231045031. The next prime is 667231045043. The reversal of 667231045042 is 240540132766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 390701253721 + 276529791321 = 625061^2 + 525861^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 667231044986 and 667231045004.

It is not an unprimeable number, because it can be changed into a prime (667231045043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166807761259 + ... + 166807761262.

Almost surely, 2^667231045042 is an apocalyptic number.

667231045042 is a deficient number, since it is larger than the sum of its proper divisors (333615522524).

667231045042 is a wasteful number, since it uses less digits than its factorization.

667231045042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333615522523.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 667231045042 in words is "six hundred sixty-seven billion, two hundred thirty-one million, forty-five thousand, forty-two".