5166444561 has 8 divisors (see below), whose sum is σ = 6889378080. Its totient is φ = 3443903712.

The previous prime is 5166444559. The next prime is 5166444583. The reversal of 5166444561 is 1654446615.

It is a happy number.

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

It is not a de Polignac number, because 5166444561 - 2¹ = 5166444559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5166444461) 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, 65956 + ... + 121173.

It is an arithmetic number, because the mean of its divisors is an integer number (861172260).

Almost surely, 2^5166444561 is an apocalyptic number.

It is an amenable number.

5166444561 is a deficient number, since it is larger than the sum of its proper divisors (1722933519).

5166444561 is a wasteful number, since it uses less digits than its factorization.

5166444561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196335.

The product of its digits is 345600, while the sum is 42.

The square root of 5166444561 is about 71877.9838406727. The cubic root of 5166444561 is about 1728.7436233151.

The spelling of 5166444561 in words is "five billion, one hundred sixty-six million, four hundred forty-four thousand, five hundred sixty-one".