667615460072740 has 24 divisors (see below), whose sum is σ = 1428445154195640. Its totient is φ = 262007576782848.

The previous prime is 667615460072723. The next prime is 667615460072747. The reversal of 667615460072740 is 47270064516766.

It can be written as a sum of positive squares in 4 ways, for example, as 10842808436964 + 656772651635776 = 3292842^2 + 25627576^2 .

It is a super-2 number, since 2×667615460072740² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (667615460072747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314912951805 + ... + 314912953924.

It is an arithmetic number, because the mean of its divisors is an integer number (59518548091485).

Almost surely, 2^{667615460072740} is an apocalyptic number.

It is an amenable number.

667615460072740 is an abundant number, since it is smaller than the sum of its proper divisors (760829694122900).

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

667615460072740 is a wasteful number, since it uses less digits than its factorization.

667615460072740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629825905791 (or 629825905789 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 61.

The spelling of 667615460072740 in words is "six hundred sixty-seven trillion, six hundred fifteen billion, four hundred sixty million, seventy-two thousand, seven hundred forty".