1066109966 has 4 divisors (see below), whose sum is σ = 1599164952. Its totient is φ = 533054982.

The previous prime is 1066109951. The next prime is 1066110029. The reversal of 1066109966 is 6699016601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6699016601 = 9349 ⋅716549.

It is a super-2 number, since 2×1066109966² = 2273180919209042312, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266527490 + ... + 266527493.

It is an arithmetic number, because the mean of its divisors is an integer number (399791238).

Almost surely, 2^1066109966 is an apocalyptic number.

1066109966 is a deficient number, since it is larger than the sum of its proper divisors (533054986).

1066109966 is an equidigital number, since it uses as much as digits as its factorization.

1066109966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533054985.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1066109966 is about 32651.3394212244. The cubic root of 1066109966 is about 1021.5681268541.

The spelling of 1066109966 in words is "one billion, sixty-six million, one hundred nine thousand, nine hundred sixty-six".