66265080081580 has 12 divisors (see below), whose sum is σ = 139156668171360. Its totient is φ = 26506032032624.

The previous prime is 66265080081559. The next prime is 66265080081593. The reversal of 66265080081580 is 8518008056266.

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, 1656627002020 + ... + 1656627002059.

It is an arithmetic number, because the mean of its divisors is an integer number (11596389014280).

Almost surely, 2^{66265080081580} is an apocalyptic number.

It is an amenable number.

66265080081580 is an abundant number, since it is smaller than the sum of its proper divisors (72891588089780).

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

66265080081580 is a wasteful number, since it uses less digits than its factorization.

66265080081580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313254004088 (or 3313254004086 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 66265080081580 in words is "sixty-six trillion, two hundred sixty-five billion, eighty million, eighty-one thousand, five hundred eighty".