66814501305 has 8 divisors (see below), whose sum is σ = 106903202112. Its totient is φ = 35634400688.

The previous prime is 66814501289. The next prime is 66814501333. The reversal of 66814501305 is 50310541866.

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

It is a cyclic number.

It is not a de Polignac number, because 66814501305 - 2⁴ = 66814501289 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2227150029 + ... + 2227150058.

It is an arithmetic number, because the mean of its divisors is an integer number (13362900264).

Almost surely, 2^66814501305 is an apocalyptic number.

It is an amenable number.

66814501305 is a deficient number, since it is larger than the sum of its proper divisors (40088700807).

66814501305 is a wasteful number, since it uses less digits than its factorization.

66814501305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4454300095.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 66814501305 in words is "sixty-six billion, eight hundred fourteen million, five hundred one thousand, three hundred five".