66610405011 has 8 divisors (see below), whose sum is σ = 88967799184. Its totient is φ = 44329973760.

The previous prime is 66610404977. The next prime is 66610405019. The reversal of 66610405011 is 11050401666.

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

It is not a de Polignac number, because 66610405011 - 2¹⁰ = 66610403987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66610405011.

It is not an unprimeable number, because it can be changed into a prime (66610405019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19238710 + ... + 19242171.

It is an arithmetic number, because the mean of its divisors is an integer number (11120974898).

Almost surely, 2^66610405011 is an apocalyptic number.

66610405011 is a deficient number, since it is larger than the sum of its proper divisors (22357394173).

66610405011 is a wasteful number, since it uses less digits than its factorization.

66610405011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38481461.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 66610405011 its reverse (11050401666), we get a palindrome (77660806677).

The spelling of 66610405011 in words is "sixty-six billion, six hundred ten million, four hundred five thousand, eleven".