66403402704 has 60 divisors (see below), whose sum is σ = 196768913796. Its totient is φ = 20832439296.

The previous prime is 66403402699. The next prime is 66403402771. The reversal of 66403402704 is 40720430466.

66403402704 is a `hidden beast` number, since 6 + 6 + 40 + 340 + 270 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18289857600 + 48113545104 = 135240^2 + 219348^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13560339 + ... + 13565234.

Almost surely, 2^66403402704 is an apocalyptic number.

It is an amenable number.

66403402704 is an abundant number, since it is smaller than the sum of its proper divisors (130365511092).

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

66403402704 is a wasteful number, since it uses less digits than its factorization.

66403402704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27125604 (or 27125595 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The spelling of 66403402704 in words is "sixty-six billion, four hundred three million, four hundred two thousand, seven hundred four".