66065556061560 has 128 divisors (see below), whose sum is σ = 216216592876800. Its totient is φ = 16015740840960.

The previous prime is 66065556061499. The next prime is 66065556061591. The reversal of 66065556061560 is 6516065556066.

It is a self number, because there is not a number n which added to its sum of digits gives 66065556061560.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 210022476 + ... + 210336804.

It is an arithmetic number, because the mean of its divisors is an integer number (1689192131850).

Almost surely, 2^{66065556061560} is an apocalyptic number.

66065556061560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66065556061560 is an abundant number, since it is smaller than the sum of its proper divisors (150151036815240).

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

66065556061560 is a wasteful number, since it uses less digits than its factorization.

66065556061560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473581 (or 473577 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 66065556061560 in words is "sixty-six trillion, sixty-five billion, five hundred fifty-six million, sixty-one thousand, five hundred sixty".