66006606610605 has 64 divisors (see below), whose sum is σ = 108508679225856. Its totient is φ = 34242754560000.

The previous prime is 66006606610583. The next prime is 66006606610619. The reversal of 66006606610605 is 50601660660066.

It is not a de Polignac number, because 66006606610605 - 2¹¹ = 66006606608557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 278813085 + ... + 279049725.

It is an arithmetic number, because the mean of its divisors is an integer number (1695448112904).

Almost surely, 2^{66006606610605} is an apocalyptic number.

It is an amenable number.

66006606610605 is a deficient number, since it is larger than the sum of its proper divisors (42502072615251).

66006606610605 is a wasteful number, since it uses less digits than its factorization.

66006606610605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238038.

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 66006606610605 in words is "sixty-six trillion, six billion, six hundred six million, six hundred ten thousand, six hundred five".