66943688484752 has 20 divisors (see below), whose sum is σ = 132866893914636. Its totient is φ = 32655457797120.

The previous prime is 66943688484733. The next prime is 66943688484791. The reversal of 66943688484752 is 25748488634966.

It can be written as a sum of positive squares in 2 ways, for example, as 13940396211856 + 53003292272896 = 3733684^2 + 7280336^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51024152153 + ... + 51024153464.

Almost surely, 2^{66943688484752} is an apocalyptic number.

It is an amenable number.

66943688484752 is a deficient number, since it is larger than the sum of its proper divisors (65923205429884).

66943688484752 is a wasteful number, since it uses less digits than its factorization.

66943688484752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102048305666 (or 102048305660 counting only the distinct ones).

The product of its digits is 13377208320, while the sum is 80.

The spelling of 66943688484752 in words is "sixty-six trillion, nine hundred forty-three billion, six hundred eighty-eight million, four hundred eighty-four thousand, seven hundred fifty-two".