1066664405644 has 24 divisors (see below), whose sum is σ = 1969284366000. Its totient is φ = 504136765440.

The previous prime is 1066664405579. The next prime is 1066664405671. The reversal of 1066664405644 is 4465044666601.

It is a super-2 number, since 2×1066664405644² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066664405591 and 1066664405600.

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, 15595117 + ... + 15663364.

It is an arithmetic number, because the mean of its divisors is an integer number (82053515250).

Almost surely, 2^{1066664405644} is an apocalyptic number.

It is an amenable number.

1066664405644 is a deficient number, since it is larger than the sum of its proper divisors (902619960356).

1066664405644 is a wasteful number, since it uses less digits than its factorization.

1066664405644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31258953 (or 31258951 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 52.

The spelling of 1066664405644 in words is "one trillion, sixty-six billion, six hundred sixty-four million, four hundred five thousand, six hundred forty-four".