6551504566 has 4 divisors (see below), whose sum is σ = 9827256852. Its totient is φ = 3275752282.

The previous prime is 6551504563. The next prime is 6551504633. The reversal of 6551504566 is 6654051556.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551504563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1637876140 + ... + 1637876143.

It is an arithmetic number, because the mean of its divisors is an integer number (2456814213).

Almost surely, 2^6551504566 is an apocalyptic number.

6551504566 is a deficient number, since it is larger than the sum of its proper divisors (3275752286).

6551504566 is a wasteful number, since it uses less digits than its factorization.

6551504566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275752285.

The product of its (nonzero) digits is 540000, while the sum is 43.

The square root of 6551504566 is about 80941.3649872548. The cubic root of 6551504566 is about 1871.1718817752.

The spelling of 6551504566 in words is "six billion, five hundred fifty-one million, five hundred four thousand, five hundred sixty-six".