66755127335015 has 16 divisors (see below), whose sum is σ = 91550070234432. Its totient is φ = 45774853799424.

The previous prime is 66755127334967. The next prime is 66755127335069. The reversal of 66755127335015 is 51053372155766.

It is a cyclic number.

It is not a de Polignac number, because 66755127335015 - 2¹⁰ = 66755127333991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19422527 + ... + 22599663.

It is an arithmetic number, because the mean of its divisors is an integer number (5721879389652).

Almost surely, 2^{66755127335015} is an apocalyptic number.

66755127335015 is a deficient number, since it is larger than the sum of its proper divisors (24794942899417).

66755127335015 is a wasteful number, since it uses less digits than its factorization.

66755127335015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777466.

The product of its (nonzero) digits is 19845000, while the sum is 56.

The spelling of 66755127335015 in words is "sixty-six trillion, seven hundred fifty-five billion, one hundred twenty-seven million, three hundred thirty-five thousand, fifteen".