745821866 has 8 divisors (see below), whose sum is σ = 1124529924. Its totient is φ = 370978560.

The previous prime is 745821863. The next prime is 745821889. The reversal of 745821866 is 668128547.

745821866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 699867025 + 45954841 = 26455^2 + 6779^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 745821866.

It is not an unprimeable number, because it can be changed into a prime (745821863) 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, 965705 + ... + 966476.

Almost surely, 2^745821866 is an apocalyptic number.

745821866 is a deficient number, since it is larger than the sum of its proper divisors (378708058).

745821866 is a wasteful number, since it uses less digits than its factorization.

745821866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932376.

The product of its digits is 645120, while the sum is 47.

The square root of 745821866 is about 27309.7393982440. The cubic root of 745821866 is about 906.8700041047.

The spelling of 745821866 in words is "seven hundred forty-five million, eight hundred twenty-one thousand, eight hundred sixty-six".