667670386615 has 8 divisors (see below), whose sum is σ = 805355783568. Its totient is φ = 531368762880.

The previous prime is 667670386601. The next prime is 667670386627. The reversal of 667670386615 is 516683076766.

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

It is a de Polignac number, because none of the positive numbers 2^k-667670386615 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345942241 + ... + 345944170.

It is an arithmetic number, because the mean of its divisors is an integer number (100669472946).

Almost surely, 2^667670386615 is an apocalyptic number.

667670386615 is a deficient number, since it is larger than the sum of its proper divisors (137685396953).

667670386615 is a wasteful number, since it uses less digits than its factorization.

667670386615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691886609.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 667670386615 in words is "six hundred sixty-seven billion, six hundred seventy million, three hundred eighty-six thousand, six hundred fifteen".