3666403 has 8 divisors (see below), whose sum is σ = 3978800. Its totient is φ = 3358368.

The previous prime is 3666371. The next prime is 3666409. The reversal of 3666403 is 3046663.

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

It is not a de Polignac number, because 3666403 - 2⁵ = 3666371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3666409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793 + ... + 2821.

It is an arithmetic number, because the mean of its divisors is an integer number (497350).

Almost surely, 2^3666403 is an apocalyptic number.

3666403 is a deficient number, since it is larger than the sum of its proper divisors (312397).

3666403 is a wasteful number, since it uses less digits than its factorization.

3666403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 3666403 is about 1914.7853665620. The cubic root of 3666403 is about 154.1984707049.

The spelling of 3666403 in words is "three million, six hundred sixty-six thousand, four hundred three".