66355123652 has 24 divisors (see below), whose sum is σ = 116260677120. Its totient is φ = 33137818560.

The previous prime is 66355123621. The next prime is 66355123661. The reversal of 66355123652 is 25632155366.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 19752749 + ... + 19756107.

It is an arithmetic number, because the mean of its divisors is an integer number (4844194880).

Almost surely, 2^66355123652 is an apocalyptic number.

It is an amenable number.

66355123652 is a deficient number, since it is larger than the sum of its proper divisors (49905553468).

66355123652 is a wasteful number, since it uses less digits than its factorization.

66355123652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7811 (or 7809 counting only the distinct ones).

The product of its digits is 972000, while the sum is 44.

The spelling of 66355123652 in words is "sixty-six billion, three hundred fifty-five million, one hundred twenty-three thousand, six hundred fifty-two".