2665740 has 96 divisors (see below), whose sum is σ = 9321984. Its totient is φ = 552960.

The previous prime is 2665727. The next prime is 2665763. The reversal of 2665740 is 475662.

2665740 = T₁₉₇ + T₁₉₈ + ... + T₂₈₆.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2665698 and 2665707.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4332 + ... + 4908.

It is an arithmetic number, because the mean of its divisors is an integer number (97104).

2^2665740 is an apocalyptic number.

2665740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4660992).

2665740 is an abundant number, since it is smaller than the sum of its proper divisors (6656244).

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

2665740 is a wasteful number, since it uses less digits than its factorization.

2665740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 2665740 is about 1632.7094046400. The cubic root of 2665740 is about 138.6561901396.

It can be divided in two parts, 266 and 5740, that added together give a palindrome (6006).

The spelling of 2665740 in words is "two million, six hundred sixty-five thousand, seven hundred forty".