5066561661 has 8 divisors (see below), whose sum is σ = 7720474944. Its totient is φ = 2895178080.

The previous prime is 5066561627. The next prime is 5066561683. The reversal of 5066561661 is 1661656605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5066561661 - 2²² = 5062367357 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5066561761) 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, 120632400 + ... + 120632441.

It is an arithmetic number, because the mean of its divisors is an integer number (965059368).

Almost surely, 2^5066561661 is an apocalyptic number.

It is an amenable number.

5066561661 is a deficient number, since it is larger than the sum of its proper divisors (2653913283).

5066561661 is a wasteful number, since it uses less digits than its factorization.

5066561661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241264851.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 5066561661 is about 71179.7840752555. The cubic root of 5066561661 is about 1717.5304451464.

The spelling of 5066561661 in words is "five billion, sixty-six million, five hundred sixty-one thousand, six hundred sixty-one".