66343326012644 has 18 divisors (see below), whose sum is σ = 118035314198802. Its totient is φ = 32627865244800.

The previous prime is 66343326012619. The next prime is 66343326012671. The reversal of 66343326012644 is 44621062334366.

It can be written as a sum of positive squares in 3 ways, for example, as 1924434817600 + 64418891195044 = 1387240^2 + 8026138^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66343326012592 and 66343326012601.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2228664437 + ... + 2228694204.

It is an arithmetic number, because the mean of its divisors is an integer number (6557517455489).

Almost surely, 2^{66343326012644} is an apocalyptic number.

It is an amenable number.

66343326012644 is a deficient number, since it is larger than the sum of its proper divisors (51691988186158).

66343326012644 is a wasteful number, since it uses less digits than its factorization.

66343326012644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457358767 (or 4457358704 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 50.

The spelling of 66343326012644 in words is "sixty-six trillion, three hundred forty-three billion, three hundred twenty-six million, twelve thousand, six hundred forty-four".