2665721486064 has 80 divisors (see below), whose sum is σ = 8475627302912. Its totient is φ = 703047423744.

The previous prime is 2665721486027. The next prime is 2665721486149. The reversal of 2665721486064 is 4606841275662.

2665721486064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2665721485995 and 2665721486013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305137744 + ... + 305146479.

Almost surely, 2^{2665721486064} is an apocalyptic number.

2665721486064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2665721486064 is an abundant number, since it is smaller than the sum of its proper divisors (5809905816848).

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

2665721486064 is a wasteful number, since it uses less digits than its factorization.

2665721486064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610284254 (or 610284248 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 57.

The spelling of 2665721486064 in words is "two trillion, six hundred sixty-five billion, seven hundred twenty-one million, four hundred eighty-six thousand, sixty-four".