2403666 has 24 divisors (see below), whose sum is σ = 5336604. Its totient is φ = 781440.

The previous prime is 2403659. The next prime is 2403673. The reversal of 2403666 is 6663042.

It is an interprime number because it is at equal distance from previous prime (2403659) and next prime (2403673).

It can be written as a sum of positive squares in 2 ways, for example, as 2387025 + 16641 = 1545^2 + 129^2 .

It is a super-2 number, since 2×2403666² = 11555220479112, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 891 + ... + 2366.

2^2403666 is an apocalyptic number.

2403666 is an abundant number, since it is smaller than the sum of its proper divisors (2932938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2403666 is a wasteful number, since it uses less digits than its factorization.

2403666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306 (or 3303 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 2403666 is about 1550.3760834069. The cubic root of 2403666 is about 133.9547259244.

The spelling of 2403666 in words is "two million, four hundred three thousand, six hundred sixty-six".