2616663666543 has 4 divisors (see below), whose sum is σ = 3488884888728. Its totient is φ = 1744442444360.

The previous prime is 2616663666527. The next prime is 2616663666571. The reversal of 2616663666543 is 3456663666162.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2616663666543 - 2⁴ = 2616663666527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2616663666503) 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, 436110611088 + ... + 436110611093.

It is an arithmetic number, because the mean of its divisors is an integer number (872221222182).

Almost surely, 2^{2616663666543} is an apocalyptic number.

2616663666543 is a deficient number, since it is larger than the sum of its proper divisors (872221222185).

2616663666543 is an equidigital number, since it uses as much as digits as its factorization.

2616663666543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872221222184.

The product of its digits is 100776960, while the sum is 60.

The spelling of 2616663666543 in words is "two trillion, six hundred sixteen billion, six hundred sixty-three million, six hundred sixty-six thousand, five hundred forty-three".