66684067794 has 24 divisors (see below), whose sum is σ = 144504272640. Its totient is φ = 22224618648.

The previous prime is 66684067789. The next prime is 66684067799. The reversal of 66684067794 is 49776048666.

It is an interprime number because it is at equal distance from previous prime (66684067789) and next prime (66684067799).

It is not an unprimeable number, because it can be changed into a prime (66684067799) 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, 161434 + ... + 399285.

It is an arithmetic number, because the mean of its divisors is an integer number (6021011360).

Almost surely, 2^66684067794 is an apocalyptic number.

66684067794 is an abundant number, since it is smaller than the sum of its proper divisors (77820204846).

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

66684067794 is a wasteful number, since it uses less digits than its factorization.

66684067794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567334 (or 567331 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 66684067794 in words is "sixty-six billion, six hundred eighty-four million, sixty-seven thousand, seven hundred ninety-four".