1066813618664 has 32 divisors (see below), whose sum is σ = 2002805153280. Its totient is φ = 532732591104.

The previous prime is 1066813618649. The next prime is 1066813618681. The reversal of 1066813618664 is 4668163186601.

It is a super-2 number, since 2×1066813618664² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27259799 + ... + 27298905.

It is an arithmetic number, because the mean of its divisors is an integer number (62587661040).

Almost surely, 2^{1066813618664} is an apocalyptic number.

It is an amenable number.

1066813618664 is a deficient number, since it is larger than the sum of its proper divisors (935991534616).

1066813618664 is a wasteful number, since it uses less digits than its factorization.

1066813618664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43337 (or 43333 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 1066813618664 in words is "one trillion, sixty-six billion, eight hundred thirteen million, six hundred eighteen thousand, six hundred sixty-four".