66707404040 has 16 divisors (see below), whose sum is σ = 150091659180. Its totient is φ = 26682961600.

The previous prime is 66707404037. The next prime is 66707404051. The reversal of 66707404040 is 4040470766.

It can be written as a sum of positive squares in 2 ways, for example, as 65594380996 + 1113023044 = 256114^2 + 33362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66707403985 and 66707404003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833842511 + ... + 833842590.

Almost surely, 2^66707404040 is an apocalyptic number.

It is an amenable number.

66707404040 is an abundant number, since it is smaller than the sum of its proper divisors (83384255140).

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

66707404040 is a wasteful number, since it uses less digits than its factorization.

66707404040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667685112 (or 1667685108 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 38.

The spelling of 66707404040 in words is "sixty-six billion, seven hundred seven million, four hundred four thousand, forty".