6566652216531 has 20 divisors (see below), whose sum is σ = 10701211020984. Its totient is φ = 3979789221600.

The previous prime is 6566652216517. The next prime is 6566652216547. The reversal of 6566652216531 is 1356122566656.

It is not a de Polignac number, because 6566652216531 - 2¹⁷ = 6566652085459 is a prime.

It is a super-2 number, since 2×6566652216531² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6566652216581) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3684989130 + ... + 3684990911.

Almost surely, 2^{6566652216531} is an apocalyptic number.

6566652216531 is a deficient number, since it is larger than the sum of its proper divisors (4134558804453).

6566652216531 is a wasteful number, since it uses less digits than its factorization.

6566652216531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7369980064 (or 7369980055 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 54.

The spelling of 6566652216531 in words is "six trillion, five hundred sixty-six billion, six hundred fifty-two million, two hundred sixteen thousand, five hundred thirty-one".