66056501760 has 80 divisors (see below), whose sum is σ = 211174403616. Its totient is φ = 17615065088.

The previous prime is 66056501743. The next prime is 66056501789. The reversal of 66056501760 is 6710565066.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×66056501760² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4292874 + ... + 4308233.

Almost surely, 2^66056501760 is an apocalyptic number.

66056501760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66056501760 is an abundant number, since it is smaller than the sum of its proper divisors (145117901856).

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

66056501760 is an equidigital number, since it uses as much as digits as its factorization.

66056501760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8601133 (or 8601117 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 66056501760 in words is "sixty-six billion, fifty-six million, five hundred one thousand, seven hundred sixty".