66545255106 has 96 divisors (see below), whose sum is σ = 163135203840. Its totient is φ = 20091883680.

The previous prime is 66545255089. The next prime is 66545255111. The reversal of 66545255106 is 60155254566.

66545255106 is a `hidden beast` number, since 66 + 54 + 5 + 25 + 510 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1791535 + ... + 1828301.

It is an arithmetic number, because the mean of its divisors is an integer number (1699325040).

Almost surely, 2^66545255106 is an apocalyptic number.

66545255106 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 66545255106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81567601920).

66545255106 is an abundant number, since it is smaller than the sum of its proper divisors (96589948734).

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

66545255106 is a wasteful number, since it uses less digits than its factorization.

66545255106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37077 (or 37060 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 66545255106 in words is "sixty-six billion, five hundred forty-five million, two hundred fifty-five thousand, one hundred six".