1066001004 has 72 divisors (see below), whose sum is σ = 2846975040. Its totient is φ = 335381472.

The previous prime is 1066000979. The next prime is 1066001009. The reversal of 1066001004 is 4001006601.

1066001004 is a `hidden beast` number, since 1 + 0 + 660 + 0 + 1 + 0 + 0 + 4 = 666.

It is a super-2 number, since 2×1066001004² = 2272716281058016032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1066001009) 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 23 ways as a sum of consecutive naturals, for example, 190819 + ... + 196325.

It is an arithmetic number, because the mean of its divisors is an integer number (39541320).

Almost surely, 2^1066001004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066001004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423487520).

1066001004 is an abundant number, since it is smaller than the sum of its proper divisors (1780974036).

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

1066001004 is a wasteful number, since it uses less digits than its factorization.

1066001004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5819 (or 5814 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1066001004 is about 32649.6708099791. The cubic root of 1066001004 is about 1021.5333224712.

Adding to 1066001004 its reverse (4001006601), we get a palindrome (5067007605).

The spelling of 1066001004 in words is "one billion, sixty-six million, one thousand, four".