66405070433 has 16 divisors (see below), whose sum is σ = 76878654720. Its totient is φ = 56835271296.

The previous prime is 66405070399. The next prime is 66405070447. The reversal of 66405070433 is 33407050466.

It is a cyclic number.

It is not a de Polignac number, because 66405070433 - 2¹² = 66405066337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66405070463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2848460 + ... + 2871677.

It is an arithmetic number, because the mean of its divisors is an integer number (4804915920).

Almost surely, 2^66405070433 is an apocalyptic number.

It is an amenable number.

66405070433 is a deficient number, since it is larger than the sum of its proper divisors (10473584287).

66405070433 is a wasteful number, since it uses less digits than its factorization.

66405070433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720216.

The product of its (nonzero) digits is 181440, while the sum is 38.

The spelling of 66405070433 in words is "sixty-six billion, four hundred five million, seventy thousand, four hundred thirty-three".