66116655320 has 16 divisors (see below), whose sum is σ = 148762474560. Its totient is φ = 26446662112.

The previous prime is 66116655313. The next prime is 66116655331. The reversal of 66116655320 is 2355661166.

66116655320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66116655320² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826458152 + ... + 826458231.

It is an arithmetic number, because the mean of its divisors is an integer number (9297654660).

Almost surely, 2^66116655320 is an apocalyptic number.

It is an amenable number.

66116655320 is an abundant number, since it is smaller than the sum of its proper divisors (82645819240).

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

66116655320 is a wasteful number, since it uses less digits than its factorization.

66116655320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652916394 (or 1652916390 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 66116655320 in words is "sixty-six billion, one hundred sixteen million, six hundred fifty-five thousand, three hundred twenty".