66089871826 has 16 divisors (see below), whose sum is σ = 108151809120. Its totient is φ = 30039532480.

The previous prime is 66089871779. The next prime is 66089871907. The reversal of 66089871826 is 62817898066.

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 7 ways as a sum of consecutive naturals, for example, 593265 + ... + 695803.

It is an arithmetic number, because the mean of its divisors is an integer number (6759488070).

Almost surely, 2^66089871826 is an apocalyptic number.

66089871826 is a deficient number, since it is larger than the sum of its proper divisors (42061937294).

66089871826 is a wasteful number, since it uses less digits than its factorization.

66089871826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131849.

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 66089871826 in words is "sixty-six billion, eighty-nine million, eight hundred seventy-one thousand, eight hundred twenty-six".