1066640022 has 128 divisors (see below), whose sum is σ = 2779822080. Its totient is φ = 296887680.

The previous prime is 1066640017. The next prime is 1066640023. The reversal of 1066640022 is 2200466601.

It is a happy number.

It is a super-2 number, since 2×1066640022² = 2275441873064320968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066640023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3850548 + ... + 3850824.

It is an arithmetic number, because the mean of its divisors is an integer number (21717360).

Almost surely, 2^1066640022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066640022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1389911040).

1066640022 is an abundant number, since it is smaller than the sum of its proper divisors (1713182058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1066640022 is a wasteful number, since it uses less digits than its factorization.

1066640022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1066640022 is about 32659.4553230760. The cubic root of 1066640022 is about 1021.7374022625.

The spelling of 1066640022 in words is "one billion, sixty-six million, six hundred forty thousand, twenty-two".