66213260676 has 48 divisors (see below), whose sum is σ = 171760572480. Its totient is φ = 22058671680.

The previous prime is 66213260651. The next prime is 66213260689. The reversal of 66213260676 is 67606231266.

66213260676 is a `hidden beast` number, since 6 + 6 + 2 + 1 + 32 + 606 + 7 + 6 = 666.

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 15 ways as a sum of consecutive naturals, for example, 21456 + ... + 364536.

It is an arithmetic number, because the mean of its divisors is an integer number (3578345260).

Almost surely, 2^66213260676 is an apocalyptic number.

It is an amenable number.

66213260676 is an abundant number, since it is smaller than the sum of its proper divisors (105547311804).

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

66213260676 is a wasteful number, since it uses less digits than its factorization.

66213260676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344881 (or 344873 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 66213260676 in words is "sixty-six billion, two hundred thirteen million, two hundred sixty thousand, six hundred seventy-six".