2640868226667 has 32 divisors (see below), whose sum is σ = 4280964491520. Its totient is φ = 1595690712000.

The previous prime is 2640868226641. The next prime is 2640868226671. The reversal of 2640868226667 is 7666228680462.

It is not a de Polignac number, because 2640868226667 - 2⁷ = 2640868226539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640868226267) 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 31 ways as a sum of consecutive naturals, for example, 13333434 + ... + 13530047.

It is an arithmetic number, because the mean of its divisors is an integer number (133780140360).

Almost surely, 2^{2640868226667} is an apocalyptic number.

2640868226667 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2640868226667 is a deficient number, since it is larger than the sum of its proper divisors (1640096264853).

2640868226667 is a wasteful number, since it uses less digits than its factorization.

2640868226667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26863832 (or 26863826 counting only the distinct ones).

The product of its (nonzero) digits is 111476736, while the sum is 63.

The spelling of 2640868226667 in words is "two trillion, six hundred forty billion, eight hundred sixty-eight million, two hundred twenty-six thousand, six hundred sixty-seven".