66885598626 has 128 divisors (see below), whose sum is σ = 179584542720. Its totient is φ = 16073702400.

The previous prime is 66885598607. The next prime is 66885598651. The reversal of 66885598626 is 62689558866.

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, 391216 + ... + 535556.

It is an arithmetic number, because the mean of its divisors is an integer number (1403004240).

Almost surely, 2^66885598626 is an apocalyptic number.

66885598626 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 66885598626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89792271360).

66885598626 is an abundant number, since it is smaller than the sum of its proper divisors (112698944094).

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

66885598626 is a wasteful number, since it uses less digits than its factorization.

66885598626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144440.

The product of its digits is 298598400, while the sum is 69.

The spelling of 66885598626 in words is "sixty-six billion, eight hundred eighty-five million, five hundred ninety-eight thousand, six hundred twenty-six".