667651447685 has 8 divisors (see below), whose sum is σ = 801264060960. Its totient is φ = 534066275664.

The previous prime is 667651447643. The next prime is 667651447703. The reversal of 667651447685 is 586744156766.

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

It is a cyclic number.

It is not a de Polignac number, because 667651447685 - 2¹⁰ = 667651446661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6806747 + ... + 6904136.

It is an arithmetic number, because the mean of its divisors is an integer number (100158007620).

Almost surely, 2^667651447685 is an apocalyptic number.

It is an amenable number.

667651447685 is a deficient number, since it is larger than the sum of its proper divisors (133612613275).

667651447685 is a wasteful number, since it uses less digits than its factorization.

667651447685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13720627.

The product of its digits is 203212800, while the sum is 65.

The spelling of 667651447685 in words is "six hundred sixty-seven billion, six hundred fifty-one million, four hundred forty-seven thousand, six hundred eighty-five".