66405070432 has 24 divisors (see below), whose sum is σ = 132878182752. Its totient is φ = 32658230400.

The previous prime is 66405070399. The next prime is 66405070447. The reversal of 66405070432 is 23407050466.

It is a junction number, because it is equal to n+sod(n) for n = 66405070391 and 66405070400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17007544 + ... + 17011447.

It is an arithmetic number, because the mean of its divisors is an integer number (5536590948).

Almost surely, 2^66405070432 is an apocalyptic number.

It is an amenable number.

66405070432 is an abundant number, since it is smaller than the sum of its proper divisors (66473112320).

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

66405070432 is a wasteful number, since it uses less digits than its factorization.

66405070432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34019062 (or 34019054 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 37.

The spelling of 66405070432 in words is "sixty-six billion, four hundred five million, seventy thousand, four hundred thirty-two".