66505601011 has 8 divisors (see below), whose sum is σ = 67178106864. Its totient is φ = 65834039040.

The previous prime is 66505600999. The next prime is 66505601017. The reversal of 66505601011 is 11010650566.

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 66505601011 - 2¹⁵ = 66505568243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66505601017) 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, 93910 + ... + 376603.

It is an arithmetic number, because the mean of its divisors is an integer number (8397263358).

Almost surely, 2^66505601011 is an apocalyptic number.

66505601011 is a deficient number, since it is larger than the sum of its proper divisors (672505853).

66505601011 is a wasteful number, since it uses less digits than its factorization.

66505601011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471941.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 66505601011 in words is "sixty-six billion, five hundred five million, six hundred one thousand, eleven".