6566816407 has 8 divisors (see below), whose sum is σ = 6685908480. Its totient is φ = 6447984120.

The previous prime is 6566816393. The next prime is 6566816429. The reversal of 6566816407 is 7046186656.

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 6566816407 - 2⁷ = 6566816279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566816437) 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, 13569 + ... + 115402.

It is an arithmetic number, because the mean of its divisors is an integer number (835738560).

Almost surely, 2^6566816407 is an apocalyptic number.

6566816407 is a deficient number, since it is larger than the sum of its proper divisors (119092073).

6566816407 is a wasteful number, since it uses less digits than its factorization.

6566816407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129893.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 6566816407 is about 81035.8957931607. The cubic root of 6566816407 is about 1872.6284833018.

The spelling of 6566816407 in words is "six billion, five hundred sixty-six million, eight hundred sixteen thousand, four hundred seven".