66013070634 has 64 divisors (see below), whose sum is σ = 177514156800. Its totient is φ = 17751412224.

The previous prime is 66013070633. The next prime is 66013070657. The reversal of 66013070634 is 43607031066.

It is a happy number.

66013070634 is a `hidden beast` number, since 6 + 6 + 0 + 13 + 0 + 7 + 0 + 634 = 666.

It is not an unprimeable number, because it can be changed into a prime (66013070633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5129979 + ... + 5142830.

It is an arithmetic number, because the mean of its divisors is an integer number (2773658700).

Almost surely, 2^66013070634 is an apocalyptic number.

66013070634 is an abundant number, since it is smaller than the sum of its proper divisors (111501086166).

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

66013070634 is a wasteful number, since it uses less digits than its factorization.

66013070634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10272844 (or 10272838 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 66013070634 in words is "sixty-six billion, thirteen million, seventy thousand, six hundred thirty-four".