667072442 has 8 divisors (see below), whose sum is σ = 1035112500. Its totient is φ = 322034944.

The previous prime is 667072429. The next prime is 667072489. The reversal of 667072442 is 244270766.

It can be written as a sum of positive squares in 2 ways, for example, as 664041361 + 3031081 = 25769^2 + 1741^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 667072396 and 667072405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5750567 + ... + 5750682.

Almost surely, 2^667072442 is an apocalyptic number.

667072442 is a deficient number, since it is larger than the sum of its proper divisors (368040058).

667072442 is a wasteful number, since it uses less digits than its factorization.

667072442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11501280.

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 667072442 is about 25827.7455849325. The cubic root of 667072442 is about 873.7576674910.

It can be divided in two parts, 6670724 and 42, that added together give a palindrome (6670766).

The spelling of 667072442 in words is "six hundred sixty-seven million, seventy-two thousand, four hundred forty-two".