2415666 has 32 divisors (see below), whose sum is σ = 5583168. Its totient is φ = 688640.

The previous prime is 2415653. The next prime is 2415689. The reversal of 2415666 is 6665142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (174474).

2^2415666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2415666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2791584).

2415666 is an abundant number, since it is smaller than the sum of its proper divisors (3167502).

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

2415666 is a wasteful number, since it uses less digits than its factorization.

2415666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186.

The product of its digits is 8640, while the sum is 30.

The square root of 2415666 is about 1554.2412940081. The cubic root of 2415666 is about 134.1772733578.

It can be divided in two parts, 2415 and 666, that added together give a triangular number (3081 = T₇₈).

The spelling of 2415666 in words is "two million, four hundred fifteen thousand, six hundred sixty-six".