66506123350 has 12 divisors (see below), whose sum is σ = 123701389524. Its totient is φ = 26602449320.

The previous prime is 66506123309. The next prime is 66506123381. The reversal of 66506123350 is 5332160566.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 665061184 + ... + 665061283.

It is an arithmetic number, because the mean of its divisors is an integer number (10308449127).

Almost surely, 2^66506123350 is an apocalyptic number.

66506123350 is a deficient number, since it is larger than the sum of its proper divisors (57195266174).

66506123350 is a wasteful number, since it uses less digits than its factorization.

66506123350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330122479 (or 1330122474 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 66506123350 in words is "sixty-six billion, five hundred six million, one hundred twenty-three thousand, three hundred fifty".