2665662464 has 48 divisors (see below), whose sum is σ = 5561861760. Its totient is φ = 1274859520.

The previous prime is 2665662463. The next prime is 2665662473. The reversal of 2665662464 is 4642665662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665662463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18809 + ... + 75399.

It is an arithmetic number, because the mean of its divisors is an integer number (115872120).

Almost surely, 2^2665662464 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 2665662464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2780930880).

2665662464 is an abundant number, since it is smaller than the sum of its proper divisors (2896199296).

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

2665662464 is an equidigital number, since it uses as much as digits as its factorization.

2665662464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56636 (or 56616 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 47.

The square root of 2665662464 is about 51630.0538833730. The cubic root of 2665662464 is about 1386.5484580365.

The spelling of 2665662464 in words is "two billion, six hundred sixty-five million, six hundred sixty-two thousand, four hundred sixty-four".