5666720551 has 8 divisors (see below), whose sum is σ = 6005576304. Its totient is φ = 5328478080.

The previous prime is 5666720539. The next prime is 5666720561. The reversal of 5666720551 is 1550276665.

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 5666720551 - 2¹¹ = 5666718503 is a prime.

It is a super-2 number, since 2×5666720551² = 64223443606251487202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5666720498 and 5666720507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5666720561) 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, 134220 + ... + 171313.

It is an arithmetic number, because the mean of its divisors is an integer number (750697038).

Almost surely, 2^5666720551 is an apocalyptic number.

5666720551 is a deficient number, since it is larger than the sum of its proper divisors (338855753).

5666720551 is a wasteful number, since it uses less digits than its factorization.

5666720551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306641.

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 5666720551 is about 75277.6231758150. The cubic root of 5666720551 is about 1782.8327313628.

The spelling of 5666720551 in words is "five billion, six hundred sixty-six million, seven hundred twenty thousand, five hundred fifty-one".