6997887543 has 8 divisors (see below), whose sum is σ = 9652258800. Its totient is φ = 4504387328.

The previous prime is 6997887509. The next prime is 6997887551. The reversal of 6997887543 is 3457887996.

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

It is a cyclic number.

It is not a de Polignac number, because 6997887543 - 2¹⁸ = 6997625399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997887343) 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, 40217658 + ... + 40217831.

It is an arithmetic number, because the mean of its divisors is an integer number (1206532350).

Almost surely, 2^6997887543 is an apocalyptic number.

6997887543 is a deficient number, since it is larger than the sum of its proper divisors (2654371257).

6997887543 is a wasteful number, since it uses less digits than its factorization.

6997887543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80435521.

The product of its digits is 91445760, while the sum is 66.

The square root of 6997887543 is about 83653.3773556095. The cubic root of 6997887543 is about 1912.7387355614.

The spelling of 6997887543 in words is "six billion, nine hundred ninety-seven million, eight hundred eighty-seven thousand, five hundred forty-three".