66133194605 has 16 divisors (see below), whose sum is σ = 80398594224. Its totient is φ = 52217356800.

The previous prime is 66133194587. The next prime is 66133194637. The reversal of 66133194605 is 50649133166.

It can be written as a sum of positive squares in 8 ways, for example, as 1646655241 + 64486539364 = 40579^2 + 253942^2 .

It is not a de Polignac number, because 66133194605 - 2²⁶ = 66066085741 is a prime.

It is a super-2 number, since 2×66133194605² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46472 + ... + 366641.

It is an arithmetic number, because the mean of its divisors is an integer number (5024912139).

Almost surely, 2^66133194605 is an apocalyptic number.

It is an amenable number.

66133194605 is a deficient number, since it is larger than the sum of its proper divisors (14265399619).

66133194605 is a wasteful number, since it uses less digits than its factorization.

66133194605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413536.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 66133194605 in words is "sixty-six billion, one hundred thirty-three million, one hundred ninety-four thousand, six hundred five".