6543666454 has 32 divisors (see below), whose sum is σ = 10644480000. Its totient is φ = 2999091744.

The previous prime is 6543666449. The next prime is 6543666523. The reversal of 6543666454 is 4546663456.

It is a super-2 number, since 2×6543666454² = 85639141322409868232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6543666398 and 6543666407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3719227 + ... + 3720985.

It is an arithmetic number, because the mean of its divisors is an integer number (332640000).

Almost surely, 2^6543666454 is an apocalyptic number.

6543666454 is a deficient number, since it is larger than the sum of its proper divisors (4100813546).

6543666454 is a wasteful number, since it uses less digits than its factorization.

6543666454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692.

The product of its digits is 6220800, while the sum is 49.

The square root of 6543666454 is about 80892.9320398266. The cubic root of 6543666454 is about 1870.4253709330.

The spelling of 6543666454 in words is "six billion, five hundred forty-three million, six hundred sixty-six thousand, four hundred fifty-four".