2664816 has 120 divisors (see below), whose sum is σ = 8820864. Its totient is φ = 685440.

The previous prime is 2664811. The next prime is 2664817. The reversal of 2664816 is 6184662.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664811) 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, 25821 + ... + 25923.

2^2664816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2664816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4410432).

2664816 is an abundant number, since it is smaller than the sum of its proper divisors (6156048).

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

2664816 is a wasteful number, since it uses less digits than its factorization.

2664816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 126 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 2664816 is about 1632.4264148806. The cubic root of 2664816 is about 138.6401679312.

The spelling of 2664816 in words is "two million, six hundred sixty-four thousand, eight hundred sixteen".