66326455811 has 18 divisors (see below), whose sum is σ = 84176968212. Its totient is φ = 51678293520.

The previous prime is 66326455807. The next prime is 66326455841. The reversal of 66326455811 is 11855462366.

It is not a de Polignac number, because 66326455811 - 2² = 66326455807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66326455801) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 5973581 + ... + 5984673.

It is an arithmetic number, because the mean of its divisors is an integer number (4676498234).

Almost surely, 2^66326455811 is an apocalyptic number.

66326455811 is a deficient number, since it is larger than the sum of its proper divisors (17850512401).

66326455811 is an frugal number, since it uses more digits than its factorization.

66326455811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22211 (or 11111 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The spelling of 66326455811 in words is "sixty-six billion, three hundred twenty-six million, four hundred fifty-five thousand, eight hundred eleven".