66571073305 has 32 divisors (see below), whose sum is σ = 89037024768. Its totient is φ = 47366457600.

The previous prime is 66571073297. The next prime is 66571073329. The reversal of 66571073305 is 50337017566.

It is a happy number.

It is not a de Polignac number, because 66571073305 - 2³ = 66571073297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11942499 + ... + 11948071.

It is an arithmetic number, because the mean of its divisors is an integer number (2782407024).

Almost surely, 2^66571073305 is an apocalyptic number.

It is an amenable number.

66571073305 is a deficient number, since it is larger than the sum of its proper divisors (22465951463).

66571073305 is a wasteful number, since it uses less digits than its factorization.

66571073305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257.

The product of its (nonzero) digits is 396900, while the sum is 43.

The spelling of 66571073305 in words is "sixty-six billion, five hundred seventy-one million, seventy-three thousand, three hundred five".