2665420064 has 24 divisors (see below), whose sum is σ = 5251031100. Its totient is φ = 1331824896.

The previous prime is 2665420061. The next prime is 2665420091. The reversal of 2665420064 is 4600245662.

2665420064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2664624400 + 795664 = 51620^2 + 892^2 .

It is not an unprimeable number, because it can be changed into a prime (2665420061) 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, 22682 + ... + 76454.

Almost surely, 2^2665420064 is an apocalyptic number.

It is an amenable number.

2665420064 is a deficient number, since it is larger than the sum of its proper divisors (2585611036).

2665420064 is a wasteful number, since it uses less digits than its factorization.

2665420064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55332 (or 55324 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 2665420064 is about 51627.7063600544. The cubic root of 2665420064 is about 1386.5064285174.

The spelling of 2665420064 in words is "two billion, six hundred sixty-five million, four hundred twenty thousand, sixty-four".