66053864412 has 36 divisors (see below), whose sum is σ = 176791226976. Its totient is φ = 20722780800.

The previous prime is 66053864411. The next prime is 66053864413. The reversal of 66053864412 is 21446835066.

66053864412 is a `hidden beast` number, since 6 + 60 + 538 + 6 + 44 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (66053864411) and next prime (66053864413).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×66053864412² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66053864411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53964964 + ... + 53966187.

It is an arithmetic number, because the mean of its divisors is an integer number (4910867416).

Almost surely, 2^66053864412 is an apocalyptic number.

It is an amenable number.

66053864412 is an abundant number, since it is smaller than the sum of its proper divisors (110737362564).

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

66053864412 is a wasteful number, since it uses less digits than its factorization.

66053864412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107931178 (or 107931173 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 66053864412 in words is "sixty-six billion, fifty-three million, eight hundred sixty-four thousand, four hundred twelve".