66045622566 has 64 divisors (see below), whose sum is σ = 167792518656. Its totient is φ = 16831027200.

The previous prime is 66045622549. The next prime is 66045622603. The reversal of 66045622566 is 66522654066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1324155 + ... + 1373126.

It is an arithmetic number, because the mean of its divisors is an integer number (2621758104).

Almost surely, 2^66045622566 is an apocalyptic number.

66045622566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66045622566 is an abundant number, since it is smaller than the sum of its proper divisors (101746896090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66045622566 is a wasteful number, since it uses less digits than its factorization.

66045622566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697357.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 66045622566 in words is "sixty-six billion, forty-five million, six hundred twenty-two thousand, five hundred sixty-six".