66714644709 has 12 divisors (see below), whose sum is σ = 99934694496. Its totient is φ = 44476429644.

The previous prime is 66714644683. The next prime is 66714644719. The reversal of 66714644709 is 90744641766.

66714644709 is a `hidden beast` number, since 66 + 71 + 46 + 4 + 470 + 9 = 666.

It is not a de Polignac number, because 66714644709 - 2⁸ = 66714644453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66714644719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137272689 + ... + 137273174.

It is an arithmetic number, because the mean of its divisors is an integer number (8327891208).

Almost surely, 2^66714644709 is an apocalyptic number.

It is an amenable number.

66714644709 is a deficient number, since it is larger than the sum of its proper divisors (33220049787).

66714644709 is an equidigital number, since it uses as much as digits as its factorization.

66714644709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274545878 (or 274545866 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 66714644709 in words is "sixty-six billion, seven hundred fourteen million, six hundred forty-four thousand, seven hundred nine".