1066504666 has 4 divisors (see below), whose sum is σ = 1599757002. Its totient is φ = 533252332.

The previous prime is 1066504657. The next prime is 1066504697. The reversal of 1066504666 is 6664056601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1048399641 + 18105025 = 32379^2 + 4255^2 .

It is a super-2 number, since 2×1066504666² = 2274864405199543112, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 266626165 + ... + 266626168.

Almost surely, 2^1066504666 is an apocalyptic number.

1066504666 is a deficient number, since it is larger than the sum of its proper divisors (533252336).

1066504666 is an equidigital number, since it uses as much as digits as its factorization.

1066504666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533252335.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 1066504666 is about 32657.3830243637. The cubic root of 1066504666 is about 1021.6941811397.

The spelling of 1066504666 in words is "one billion, sixty-six million, five hundred four thousand, six hundred sixty-six".