2665416460440 has 128 divisors (see below), whose sum is σ = 8170606080000. Its totient is φ = 695294995968.

The previous prime is 2665416460423. The next prime is 2665416460451. The reversal of 2665416460440 is 440646145662.

It is a self number, because there is not a number n which added to its sum of digits gives 2665416460440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10871121 + ... + 11113599.

It is an arithmetic number, because the mean of its divisors is an integer number (63832860000).

Almost surely, 2^{2665416460440} is an apocalyptic number.

2665416460440 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 2665416460440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4085303040000).

2665416460440 is an abundant number, since it is smaller than the sum of its proper divisors (5505189619560).

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

2665416460440 is a wasteful number, since it uses less digits than its factorization.

2665416460440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244489 (or 244485 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 2665416460440 in words is "two trillion, six hundred sixty-five billion, four hundred sixteen million, four hundred sixty thousand, four hundred forty".