667505331442 has 8 divisors (see below), whose sum is σ = 1002623972076. Its totient is φ = 333297340752.

The previous prime is 667505331419. The next prime is 667505331491. The reversal of 667505331442 is 244133505766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 653172692481 + 14332638961 = 808191^2 + 119719^2 .

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 = 667505331392 and 667505331401.

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, 227660653 + ... + 227663584.

Almost surely, 2^667505331442 is an apocalyptic number.

667505331442 is a deficient number, since it is larger than the sum of its proper divisors (335118640634).

667505331442 is a wasteful number, since it uses less digits than its factorization.

667505331442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455324972.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 667505331442 in words is "six hundred sixty-seven billion, five hundred five million, three hundred thirty-one thousand, four hundred forty-two".