5666626729 has 3 divisors (see below), whose sum is σ = 5666702007. Its totient is φ = 5666551452.

The previous prime is 5666626727. The next prime is 5666626753. The reversal of 5666626729 is 9276266665.

The square root of 5666626729 is 75277.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 4822608025 + 844018704 = 69445^2 + 29052^2 .

It is not a de Polignac number, because 5666626729 - 2¹ = 5666626727 is a prime.

It is a super-2 number, since 2×5666626729² = 64221316971634478882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5666626729.

It is not an unprimeable number, because it can be changed into a prime (5666626727) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37639 + ... + 112915.

It is an arithmetic number, because the mean of its divisors is an integer number (1888900669).

Almost surely, 2^5666626729 is an apocalyptic number.

5666626729 is the 75277-th square number.

5666626729 is the 37639-th centered octagonal number.

It is an amenable number.

5666626729 is a deficient number, since it is larger than the sum of its proper divisors (75278).

5666626729 is an frugal number, since it uses more digits than its factorization.

5666626729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150554 (or 75277 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The cubic root of 5666626729 is about 1782.8228920531.

The spelling of 5666626729 in words is "five billion, six hundred sixty-six million, six hundred twenty-six thousand, seven hundred twenty-nine".