1066644326 has 16 divisors (see below), whose sum is σ = 1786010688. Its totient is φ = 473562600.

The previous prime is 1066644323. The next prime is 1066644407. The reversal of 1066644326 is 6234466601.

It is a happy number.

It is a super-2 number, since 2×1066644326² = 2275460236375988552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066644326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066644323) by changing a digit.

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, 562820 + ... + 564711.

It is an arithmetic number, because the mean of its divisors is an integer number (111625668).

Almost surely, 2^1066644326 is an apocalyptic number.

1066644326 is a deficient number, since it is larger than the sum of its proper divisors (719366362).

1066644326 is a wasteful number, since it uses less digits than its factorization.

1066644326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127587.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 1066644326 is about 32659.5212151066. The cubic root of 1066644326 is about 1021.7387765318.

It can be divided in two parts, 1066 and 644326, that multiplied together give a triangular number (686851516 = T₃₇₀₆₃).

The spelling of 1066644326 in words is "one billion, sixty-six million, six hundred forty-four thousand, three hundred twenty-six".