1066321604 has 24 divisors (see below), whose sum is σ = 1920064608. Its totient is φ = 517847360.

The previous prime is 1066321589. The next prime is 1066321609. The reversal of 1066321604 is 4061236601.

It is a happy number.

It is a super-2 number, since 2×1066321604² = 2274083526314265632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066321609) 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 7 ways as a sum of consecutive naturals, for example, 22907 + ... + 51549.

It is an arithmetic number, because the mean of its divisors is an integer number (80002692).

Almost surely, 2^1066321604 is an apocalyptic number.

It is an amenable number.

1066321604 is a deficient number, since it is larger than the sum of its proper divisors (853743004).

1066321604 is a wasteful number, since it uses less digits than its factorization.

1066321604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28915 (or 28913 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1066321604 is about 32654.5801381674. The cubic root of 1066321604 is about 1021.6357209852.

The spelling of 1066321604 in words is "one billion, sixty-six million, three hundred twenty-one thousand, six hundred four".