666734748140 has 24 divisors (see below), whose sum is σ = 1414005777072. Its totient is φ = 264053364800.

The previous prime is 666734748103. The next prime is 666734748161. The reversal of 666734748140 is 41847437666.

It is an unprimeable number.

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, 165031334 + ... + 165035373.

It is an arithmetic number, because the mean of its divisors is an integer number (58916907378).

Almost surely, 2^666734748140 is an apocalyptic number.

It is an amenable number.

666734748140 is an abundant number, since it is smaller than the sum of its proper divisors (747271028932).

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

666734748140 is a wasteful number, since it uses less digits than its factorization.

666734748140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330066817 (or 330066815 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 666734748140 in words is "six hundred sixty-six billion, seven hundred thirty-four million, seven hundred forty-eight thousand, one hundred forty".