666428680460 has 48 divisors (see below), whose sum is σ = 1495966352832. Its totient is φ = 248762342400.

The previous prime is 666428680447. The next prime is 666428680481. The reversal of 666428680460 is 64086824666.

It is a super-2 number, since 2×666428680460² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666428680396 and 666428680405.

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 15 ways as a sum of consecutive naturals, for example, 17648921 + ... + 17686640.

It is an arithmetic number, because the mean of its divisors is an integer number (31165965684).

Almost surely, 2^666428680460 is an apocalyptic number.

It is an amenable number.

666428680460 is an abundant number, since it is smaller than the sum of its proper divisors (829537672372).

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

666428680460 is a wasteful number, since it uses less digits than its factorization.

666428680460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35335634 (or 35335632 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 56.

The spelling of 666428680460 in words is "six hundred sixty-six billion, four hundred twenty-eight million, six hundred eighty thousand, four hundred sixty".