409694066 has 8 divisors (see below), whose sum is σ = 616728924. Its totient is φ = 204117760.

The previous prime is 409694057. The next prime is 409694071. The reversal of 409694066 is 660496904.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 395413225 + 14280841 = 19885^2 + 3779^2 .

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

It is a super-3 number, since 3×409694066³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363935 + ... + 365058.

Almost surely, 2^409694066 is an apocalyptic number.

409694066 is a deficient number, since it is larger than the sum of its proper divisors (207034858).

409694066 is a wasteful number, since it uses less digits than its factorization.

409694066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729276.

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

The square root of 409694066 is about 20240.9008198746. The cubic root of 409694066 is about 742.7110600286.

The spelling of 409694066 in words is "four hundred nine million, six hundred ninety-four thousand, sixty-six".