66013070656 has 56 divisors (see below), whose sum is σ = 141103587744. Its totient is φ = 30460577280.

The previous prime is 66013070633. The next prime is 66013070657. The reversal of 66013070656 is 65607031066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013070657) by changing a digit.

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, 5994051 + ... + 6005053.

It is an arithmetic number, because the mean of its divisors is an integer number (2519706924).

Almost surely, 2^66013070656 is an apocalyptic number.

It is an amenable number.

66013070656 is an abundant number, since it is smaller than the sum of its proper divisors (75090517088).

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

66013070656 is a wasteful number, since it uses less digits than its factorization.

66013070656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18239 (or 18229 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 40.

The spelling of 66013070656 in words is "sixty-six billion, thirteen million, seventy thousand, six hundred fifty-six".