66922585636 has 9 divisors (see below), whose sum is σ = 117115430299. Its totient is φ = 33461034124.

The previous prime is 66922585619. The next prime is 66922585637. The reversal of 66922585636 is 63658522966.

It is a happy number.

The square root of 66922585636 is 258694.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66922585637) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 452715 + ... + 582061.

Almost surely, 2^66922585636 is an apocalyptic number.

66922585636 is the 258694-th square number.

It is an amenable number.

66922585636 is a deficient number, since it is larger than the sum of its proper divisors (50192844663).

66922585636 is an frugal number, since it uses more digits than its factorization.

66922585636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258698 (or 129349 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 58.

The spelling of 66922585636 in words is "sixty-six billion, nine hundred twenty-two million, five hundred eighty-five thousand, six hundred thirty-six".