1066630666 has 8 divisors (see below), whose sum is σ = 1620198720. Its totient is φ = 526564428.

The previous prime is 1066630661. The next prime is 1066630699. The reversal of 1066630666 is 6660366601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1066630666² = 2275401955303207112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066630661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3375256 + ... + 3375571.

It is an arithmetic number, because the mean of its divisors is an integer number (202524840).

Almost surely, 2^1066630666 is an apocalyptic number.

1066630666 is a deficient number, since it is larger than the sum of its proper divisors (553568054).

1066630666 is an equidigital number, since it uses as much as digits as its factorization.

1066630666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750908.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 1066630666 is about 32659.3120870603. The cubic root of 1066630666 is about 1021.7344148744.

The spelling of 1066630666 in words is "one billion, sixty-six million, six hundred thirty thousand, six hundred sixty-six".