666685927458 has 24 divisors (see below), whose sum is σ = 1452048938496. Its totient is φ = 221065140600.

The previous prime is 666685927451. The next prime is 666685927459. The reversal of 666685927458 is 854729586666.

It is not an unprimeable number, because it can be changed into a prime (666685927451) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 96954958 + ... + 96961833.

It is an arithmetic number, because the mean of its divisors is an integer number (60502039104).

Almost surely, 2^666685927458 is an apocalyptic number.

666685927458 is an abundant number, since it is smaller than the sum of its proper divisors (785363011038).

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

666685927458 is a wasteful number, since it uses less digits than its factorization.

666685927458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193916990 (or 193916987 counting only the distinct ones).

The product of its digits is 1045094400, while the sum is 72.

The spelling of 666685927458 in words is "six hundred sixty-six billion, six hundred eighty-five million, nine hundred twenty-seven thousand, four hundred fifty-eight".