66076808257281 has 8 divisors (see below), whose sum is σ = 88103359810240. Its totient is φ = 44050731104592.

The previous prime is 66076808257279. The next prime is 66076808257289. The reversal of 66076808257281 is 18275280867066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66076808257281 - 2¹ = 66076808257279 is a prime.

It is a super-2 number, since 2×66076808257281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66076808257289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118274941 + ... + 118832298.

It is an arithmetic number, because the mean of its divisors is an integer number (11012919976280).

Almost surely, 2^{66076808257281} is an apocalyptic number.

It is an amenable number.

66076808257281 is a deficient number, since it is larger than the sum of its proper divisors (22026551552959).

66076808257281 is a wasteful number, since it uses less digits than its factorization.

66076808257281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237200135.

The product of its (nonzero) digits is 108380160, while the sum is 66.

The spelling of 66076808257281 in words is "sixty-six trillion, seventy-six billion, eight hundred eight million, two hundred fifty-seven thousand, two hundred eighty-one".