5661766129 has 4 divisors (see below), whose sum is σ = 5959753840. Its totient is φ = 5363778420.

The previous prime is 5661766111. The next prime is 5661766133. The reversal of 5661766129 is 9216671665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5661766129 - 2⁹ = 5661765617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661766169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148993827 + ... + 148993864.

It is an arithmetic number, because the mean of its divisors is an integer number (1489938460).

Almost surely, 2^5661766129 is an apocalyptic number.

It is an amenable number.

5661766129 is a deficient number, since it is larger than the sum of its proper divisors (297987711).

5661766129 is a wasteful number, since it uses less digits than its factorization.

5661766129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297987710.

The product of its digits is 816480, while the sum is 49.

The square root of 5661766129 is about 75244.7083122793. The cubic root of 5661766129 is about 1782.3130021187.

The spelling of 5661766129 in words is "five billion, six hundred sixty-one million, seven hundred sixty-six thousand, one hundred twenty-nine".