409086665 has 32 divisors (see below), whose sum is σ = 539191296. Its totient is φ = 296144640.

The previous prime is 409086661. The next prime is 409086677. The reversal of 409086665 is 566680904.

409086665 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 409086665 - 2² = 409086661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409086661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1030247 + ... + 1030643.

It is an arithmetic number, because the mean of its divisors is an integer number (16849728).

Almost surely, 2^409086665 is an apocalyptic number.

It is an amenable number.

409086665 is a deficient number, since it is larger than the sum of its proper divisors (130104631).

409086665 is a wasteful number, since it uses less digits than its factorization.

409086665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 409086665 is about 20225.8909568899. The cubic root of 409086665 is about 742.3438375872.

The spelling of 409086665 in words is "four hundred nine million, eighty-six thousand, six hundred sixty-five".