1066006610666 has 4 divisors (see below), whose sum is σ = 1599009916002. Its totient is φ = 533003305332.

The previous prime is 1066006610623. The next prime is 1066006610777. The reversal of 1066006610666 is 6660166006601.

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., 1020433327225 + 45573283441 = 1010165^2 + 213479^2 .

It is a super-2 number, since 2×1066006610666² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266501652665 + ... + 266501652668.

Almost surely, 2^{1066006610666} is an apocalyptic number.

1066006610666 is a deficient number, since it is larger than the sum of its proper divisors (533003305336).

1066006610666 is an equidigital number, since it uses as much as digits as its factorization.

1066006610666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533003305335.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 1066006610666 in words is "one trillion, sixty-six billion, six million, six hundred ten thousand, six hundred sixty-six".