66311811742 has 96 divisors (see below), whose sum is σ = 116386320960. Its totient is φ = 28264051200.

The previous prime is 66311811703. The next prime is 66311811743. The reversal of 66311811742 is 24711811366.

It is a junction number, because it is equal to n+sod(n) for n = 66311811695 and 66311811704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66311811743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91212583 + ... + 91213309.

It is an arithmetic number, because the mean of its divisors is an integer number (1212357510).

Almost surely, 2^66311811742 is an apocalyptic number.

66311811742 is a deficient number, since it is larger than the sum of its proper divisors (50074509218).

66311811742 is a wasteful number, since it uses less digits than its factorization.

66311811742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138 (or 1127 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The spelling of 66311811742 in words is "sixty-six billion, three hundred eleven million, eight hundred eleven thousand, seven hundred forty-two".