2666438064 has 60 divisors (see below), whose sum is σ = 7470814000. Its totient is φ = 887801472.

The previous prime is 2666438063. The next prime is 2666438081. The reversal of 2666438064 is 4608346662.

It is not an unprimeable number, because it can be changed into a prime (2666438063) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 122262 + ... + 142410.

Almost surely, 2^2666438064 is an apocalyptic number.

2666438064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2666438064 is an abundant number, since it is smaller than the sum of its proper divisors (4804375936).

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

2666438064 is a wasteful number, since it uses less digits than its factorization.

2666438064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21082 (or 21073 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The square root of 2666438064 is about 51637.5644661907. The cubic root of 2666438064 is about 1386.6829215098.

The spelling of 2666438064 in words is "two billion, six hundred sixty-six million, four hundred thirty-eight thousand, sixty-four".