66659495666 has 16 divisors (see below), whose sum is σ = 104463437184. Its totient is φ = 31841873184.

The previous prime is 66659495657. The next prime is 66659495681.

66659495666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66659495596 and 66659495605.

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, 842531 + ... + 918246.

It is an arithmetic number, because the mean of its divisors is an integer number (6528964824).

Almost surely, 2^66659495666 is an apocalyptic number.

66659495666 is a deficient number, since it is larger than the sum of its proper divisors (37803941518).

66659495666 is a wasteful number, since it uses less digits than its factorization.

66659495666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761625.

The product of its digits is 377913600, while the sum is 68.

The spelling of 66659495666 in words is "sixty-six billion, six hundred fifty-nine million, four hundred ninety-five thousand, six hundred sixty-six".