667424576842 has 8 divisors (see below), whose sum is σ = 1060027269156. Its totient is φ = 314082153792.

The previous prime is 667424576837. The next prime is 667424576843. The reversal of 667424576842 is 248675424766.

It can be written as a sum of positive squares in 2 ways, for example, as 649331367721 + 18093209121 = 805811^2 + 134511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (667424576843) 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, 9815067273 + ... + 9815067340.

Almost surely, 2^667424576842 is an apocalyptic number.

667424576842 is a deficient number, since it is larger than the sum of its proper divisors (392602692314).

667424576842 is a wasteful number, since it uses less digits than its factorization.

667424576842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19630134632.

The product of its digits is 108380160, while the sum is 61.

The spelling of 667424576842 in words is "six hundred sixty-seven billion, four hundred twenty-four million, five hundred seventy-six thousand, eight hundred forty-two".