667728117386 has 8 divisors (see below), whose sum is σ = 1092646010304. Its totient is φ = 303512780620.

The previous prime is 667728117377. The next prime is 667728117403. The reversal of 667728117386 is 683711827766.

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

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, 15175639010 + ... + 15175639053.

It is an arithmetic number, because the mean of its divisors is an integer number (136580751288).

Almost surely, 2^667728117386 is an apocalyptic number.

667728117386 is a deficient number, since it is larger than the sum of its proper divisors (424917892918).

667728117386 is a wasteful number, since it uses less digits than its factorization.

667728117386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30351278076.

The product of its digits is 28449792, while the sum is 62.

The spelling of 667728117386 in words is "six hundred sixty-seven billion, seven hundred twenty-eight million, one hundred seventeen thousand, three hundred eighty-six".