66754808734127 has 16 divisors (see below), whose sum is σ = 67860194688000. Its totient is φ = 65655957310944.

The previous prime is 66754808734111. The next prime is 66754808734153. The reversal of 66754808734127 is 72143780845766.

It is a cyclic number.

It is not a de Polignac number, because 66754808734127 - 2⁴ = 66754808734111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66754807734127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494196524 + ... + 494331582.

It is an arithmetic number, because the mean of its divisors is an integer number (4241262168000).

Almost surely, 2^{66754808734127} is an apocalyptic number.

66754808734127 is a deficient number, since it is larger than the sum of its proper divisors (1105385953873).

66754808734127 is a wasteful number, since it uses less digits than its factorization.

66754808734127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159190.

The product of its (nonzero) digits is 379330560, while the sum is 68.

The spelling of 66754808734127 in words is "sixty-six trillion, seven hundred fifty-four billion, eight hundred eight million, seven hundred thirty-four thousand, one hundred twenty-seven".