66717034040 has 64 divisors (see below), whose sum is σ = 151032168000. Its totient is φ = 26523878400.

The previous prime is 66717034037. The next prime is 66717034063. The reversal of 66717034040 is 4043071766.

It is a junction number, because it is equal to n+sod(n) for n = 66717033985 and 66717034003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5499101 + ... + 5511219.

It is an arithmetic number, because the mean of its divisors is an integer number (2359877625).

Almost surely, 2^66717034040 is an apocalyptic number.

It is an amenable number.

66717034040 is an abundant number, since it is smaller than the sum of its proper divisors (84315133960).

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

66717034040 is a wasteful number, since it uses less digits than its factorization.

66717034040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12960 (or 12956 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 66717034040 in words is "sixty-six billion, seven hundred seventeen million, thirty-four thousand, forty".