2666444441387 has 8 divisors (see below), whose sum is σ = 2716785489600. Its totient is φ = 2616104533120.

The previous prime is 2666444441341. The next prime is 2666444441407. The reversal of 2666444441387 is 7831444446662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666444441387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666444441887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5557187 + ... + 6017907.

It is an arithmetic number, because the mean of its divisors is an integer number (339598186200).

Almost surely, 2^{2666444441387} is an apocalyptic number.

2666444441387 is a deficient number, since it is larger than the sum of its proper divisors (50341048213).

2666444441387 is a wasteful number, since it uses less digits than its factorization.

2666444441387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569973.

The product of its digits is 74317824, while the sum is 59.

The spelling of 2666444441387 in words is "two trillion, six hundred sixty-six billion, four hundred forty-four million, four hundred forty-one thousand, three hundred eighty-seven".