3663405 has 12 divisors (see below), whose sum is σ = 6349980. Its totient is φ = 1953792.

The previous prime is 3663383. The next prime is 3663419. The reversal of 3663405 is 5043663.

It can be written as a sum of positive squares in 2 ways, for example, as 1313316 + 2350089 = 1146^2 + 1533^2 .

It is not a de Polignac number, because 3663405 - 2⁷ = 3663277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40660 + ... + 40749.

It is an arithmetic number, because the mean of its divisors is an integer number (529165).

Almost surely, 2^3663405 is an apocalyptic number.

It is an amenable number.

3663405 is a deficient number, since it is larger than the sum of its proper divisors (2686575).

3663405 is a wasteful number, since it uses less digits than its factorization.

3663405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81420 (or 81417 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 3663405 is about 1914.0023510957. The cubic root of 3663405 is about 154.1564301295.

The spelling of 3663405 in words is "three million, six hundred sixty-three thousand, four hundred five".