2451666 has 48 divisors (see below), whose sum is σ = 5909760. Its totient is φ = 675360.

The previous prime is 2451643. The next prime is 2451667. The reversal of 2451666 is 6661542.

It is not an unprimeable number, because it can be changed into a prime (2451667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8980 + ... + 9248.

It is an arithmetic number, because the mean of its divisors is an integer number (123120).

2^2451666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2451666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2954880).

2451666 is an abundant number, since it is smaller than the sum of its proper divisors (3458094).

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

2451666 is a wasteful number, since it uses less digits than its factorization.

2451666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319 (or 312 counting only the distinct ones).

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

The square root of 2451666 is about 1565.7796779879. The cubic root of 2451666 is about 134.8405249928.

The spelling of 2451666 in words is "two million, four hundred fifty-one thousand, six hundred sixty-six".