2666954364543 has 48 divisors (see below), whose sum is σ = 4564115951616. Its totient is φ = 1468483551360.

The previous prime is 2666954364497. The next prime is 2666954364611. The reversal of 2666954364543 is 3454634596662.

It is not a de Polignac number, because 2666954364543 - 2¹⁶ = 2666954299007 is a prime.

It is a super-2 number, since 2×2666954364543² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666954324543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2475355 + ... + 3385452.

It is an arithmetic number, because the mean of its divisors is an integer number (95085748992).

Almost surely, 2^{2666954364543} is an apocalyptic number.

2666954364543 is a deficient number, since it is larger than the sum of its proper divisors (1897161587073).

2666954364543 is a wasteful number, since it uses less digits than its factorization.

2666954364543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5861084 (or 5861081 counting only the distinct ones).

The product of its digits is 335923200, while the sum is 63.

The spelling of 2666954364543 in words is "two trillion, six hundred sixty-six billion, nine hundred fifty-four million, three hundred sixty-four thousand, five hundred forty-three".