66513415404 has 24 divisors (see below), whose sum is σ = 155379936880. Its totient is φ = 22145143104.

The previous prime is 66513415391. The next prime is 66513415439. The reversal of 66513415404 is 40451431566.

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 7 ways as a sum of consecutive naturals, for example, 3238759 + ... + 3259230.

Almost surely, 2^66513415404 is an apocalyptic number.

It is an amenable number.

66513415404 is an abundant number, since it is smaller than the sum of its proper divisors (88866521476).

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

66513415404 is a wasteful number, since it uses less digits than its factorization.

66513415404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6498849 (or 6498847 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 66513415404 in words is "sixty-six billion, five hundred thirteen million, four hundred fifteen thousand, four hundred four".