66433106644 has 12 divisors (see below), whose sum is σ = 116291668500. Its totient is φ = 33206915648.

The previous prime is 66433106639. The next prime is 66433106657. The reversal of 66433106644 is 44660133466.

It can be written as a sum of positive squares in 2 ways, for example, as 24822002500 + 41611104144 = 157550^2 + 203988^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66433106644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2393899 + ... + 2421490.

It is an arithmetic number, because the mean of its divisors is an integer number (9690972375).

Almost surely, 2^66433106644 is an apocalyptic number.

It is an amenable number.

66433106644 is a deficient number, since it is larger than the sum of its proper divisors (49858561856).

66433106644 is a wasteful number, since it uses less digits than its factorization.

66433106644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4818842 (or 4818840 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 66433106644 in words is "sixty-six billion, four hundred thirty-three million, one hundred six thousand, six hundred forty-four".