1066019866 has 4 divisors (see below), whose sum is σ = 1599029802. Its totient is φ = 533009932.

The previous prime is 1066019863. The next prime is 1066019869. The reversal of 1066019866 is 6689106601.

It is a happy number.

1066019866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (1066019863) and next prime (1066019869).

It can be written as a sum of positive squares in only one way, i.e., 785624841 + 280395025 = 28029^2 + 16745^2 .

It is a super-2 number, since 2×1066019866² = 2272796709413315912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1066019861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266504965 + ... + 266504968.

Almost surely, 2^1066019866 is an apocalyptic number.

1066019866 is a deficient number, since it is larger than the sum of its proper divisors (533009936).

1066019866 is an equidigital number, since it uses as much as digits as its factorization.

1066019866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533009935.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 1066019866 is about 32649.9596630685. The cubic root of 1066019866 is about 1021.5393474961.

The spelling of 1066019866 in words is "one billion, sixty-six million, nineteen thousand, eight hundred sixty-six".