667615453064646 has 8 divisors (see below), whose sum is σ = 1335230906129304. Its totient is φ = 222538484354880.

The previous prime is 667615453064627. The next prime is 667615453064663. The reversal of 667615453064646 is 646460354516766.

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

667615453064646 is an admirable number.

It is a congruent number.

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, 55634621088715 + ... + 55634621088726.

It is an arithmetic number, because the mean of its divisors is an integer number (166903863266163).

Almost surely, 2^{667615453064646} is an apocalyptic number.

667615453064646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667615453064646 is a wasteful number, since it uses less digits than its factorization.

667615453064646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111269242177446.

The product of its (nonzero) digits is 1567641600, while the sum is 69.

The spelling of 667615453064646 in words is "six hundred sixty-seven trillion, six hundred fifteen billion, four hundred fifty-three million, sixty-four thousand, six hundred forty-six".