2660688 has 50 divisors (see below), whose sum is σ = 7704554. Its totient is φ = 886464.

The previous prime is 2660659. The next prime is 2660719. The reversal of 2660688 is 8860662.

It can be written as a sum of positive squares in only one way, i.e., 2286144 + 374544 = 1512^2 + 612^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 270 + ... + 2322.

2^2660688 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 2660688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3852277).

2660688 is an abundant number, since it is smaller than the sum of its proper divisors (5043866).

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

2660688 is a wasteful number, since it uses less digits than its factorization.

2660688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073 (or 2058 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 2660688 is about 1631.1615493261. The cubic root of 2660688 is about 138.5685429256.

The spelling of 2660688 in words is "two million, six hundred sixty thousand, six hundred eighty-eight".