66940120746 has 12 divisors (see below), whose sum is σ = 145036928322. Its totient is φ = 22313373576.

The previous prime is 66940120733. The next prime is 66940120777. The reversal of 66940120746 is 64702104966.

It can be written as a sum of positive squares in only one way, i.e., 63750695121 + 3189425625 = 252489^2 + 56475^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1859447781 + ... + 1859447816.

Almost surely, 2^66940120746 is an apocalyptic number.

66940120746 is an abundant number, since it is smaller than the sum of its proper divisors (78096807576).

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

66940120746 is a wasteful number, since it uses less digits than its factorization.

66940120746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718895605 (or 3718895602 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 66940120746 in words is "sixty-six billion, nine hundred forty million, one hundred twenty thousand, seven hundred forty-six".