667185055728 has 80 divisors (see below), whose sum is σ = 1783223678880. Its totient is φ = 214698631168.

The previous prime is 667185055679. The next prime is 667185055753. The reversal of 667185055728 is 827550581766.

667185055728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12692476 + ... + 12744932.

It is an arithmetic number, because the mean of its divisors is an integer number (22290295986).

Almost surely, 2^667185055728 is an apocalyptic number.

It is an amenable number.

667185055728 is an abundant number, since it is smaller than the sum of its proper divisors (1116038623152).

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

667185055728 is a wasteful number, since it uses less digits than its factorization.

667185055728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61634 (or 61628 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 60.

The spelling of 667185055728 in words is "six hundred sixty-seven billion, one hundred eighty-five million, fifty-five thousand, seven hundred twenty-eight".