1066599999 has 48 divisors (see below), whose sum is σ = 1686776832. Its totient is φ = 647469504.

The previous prime is 1066599997. The next prime is 1066600039. The reversal of 1066599999 is 9999956601.

It is not a de Polignac number, because 1066599999 - 2¹ = 1066599997 is a prime.

It is a super-2 number, since 2×1066599999² = 2275271115733600002, which contains 22 as substring.

1066599999 is a modest number, since divided by 99999 gives 10665 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066599991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 358492 + ... + 361454.

It is an arithmetic number, because the mean of its divisors is an integer number (35141184).

Almost surely, 2^1066599999 is an apocalyptic number.

1066599999 is a deficient number, since it is larger than the sum of its proper divisors (620176833).

1066599999 is a wasteful number, since it uses less digits than its factorization.

1066599999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3076 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 10628820, while the sum is 63.

The square root of 1066599999 is about 32658.8425851254. The cubic root of 1066599999 is about 1021.7246227222.

The spelling of 1066599999 in words is "one billion, sixty-six million, five hundred ninety-nine thousand, nine hundred ninety-nine".