667946617 has 8 divisors (see below), whose sum is σ = 719902400. Its totient is φ = 616073040.

The previous prime is 667946603. The next prime is 667946639. The reversal of 667946617 is 716649766.

667946617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667946617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667946687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3117 + ... + 36682.

It is an arithmetic number, because the mean of its divisors is an integer number (89987800).

Almost surely, 2^667946617 is an apocalyptic number.

It is an amenable number.

667946617 is a deficient number, since it is larger than the sum of its proper divisors (51955783).

667946617 is a wasteful number, since it uses less digits than its factorization.

667946617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41103.

The product of its digits is 2286144, while the sum is 52.

The square root of 667946617 is about 25844.6632208663. The cubic root of 667946617 is about 874.1391771302.

The spelling of 667946617 in words is "six hundred sixty-seven million, nine hundred forty-six thousand, six hundred seventeen".