667460173820 has 24 divisors (see below), whose sum is σ = 1529090580528. Its totient is φ = 242712790400.

The previous prime is 667460173801. The next prime is 667460173867. The reversal of 667460173820 is 28371064766.

It is a super-2 number, since 2×667460173820² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1516954721 + ... + 1516955160.

It is an arithmetic number, because the mean of its divisors is an integer number (63712107522).

Almost surely, 2^667460173820 is an apocalyptic number.

It is an amenable number.

667460173820 is an abundant number, since it is smaller than the sum of its proper divisors (861630406708).

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

667460173820 is a wasteful number, since it uses less digits than its factorization.

667460173820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033909901 (or 3033909899 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 667460173820 in words is "six hundred sixty-seven billion, four hundred sixty million, one hundred seventy-three thousand, eight hundred twenty".