1066645499 has 4 divisors (see below), whose sum is σ = 1066710936. Its totient is φ = 1066580064.

The previous prime is 1066645477. The next prime is 1066645507. The reversal of 1066645499 is 9945466601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066645499 is a prime.

It is a super-2 number, since 2×1066645499² = 2275465241073918002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066645409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13427 + ... + 48099.

It is an arithmetic number, because the mean of its divisors is an integer number (266677734).

Almost surely, 2^1066645499 is an apocalyptic number.

1066645499 is a deficient number, since it is larger than the sum of its proper divisors (65437).

1066645499 is an equidigital number, since it uses as much as digits as its factorization.

1066645499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65436.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 1066645499 is about 32659.5391731114. The cubic root of 1066645499 is about 1021.7391510706.

It can be divided in two parts, 10666 and 45499, that added together give a palindrome (56165).

The spelling of 1066645499 in words is "one billion, sixty-six million, six hundred forty-five thousand, four hundred ninety-nine".