66131882066 has 16 divisors (see below), whose sum is σ = 99500495040. Its totient is φ = 32965122960.

The previous prime is 66131882057. The next prime is 66131882071. The reversal of 66131882066 is 66028813166.

It is a self number, because there is not a number n which added to its sum of digits gives 66131882066.

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 7 ways as a sum of consecutive naturals, for example, 1970075 + ... + 2003361.

It is an arithmetic number, because the mean of its divisors is an integer number (6218780940).

Almost surely, 2^66131882066 is an apocalyptic number.

66131882066 is a deficient number, since it is larger than the sum of its proper divisors (33368612974).

66131882066 is a wasteful number, since it uses less digits than its factorization.

66131882066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36289.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 66131882066 in words is "sixty-six billion, one hundred thirty-one million, eight hundred eighty-two thousand, sixty-six".