5661012217 has 4 divisors (see below), whose sum is σ = 6469728256. Its totient is φ = 4852296180.

The previous prime is 5661012187. The next prime is 5661012239. The reversal of 5661012217 is 7122101665.

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 a de Polignac number, because none of the positive numbers 2^k-5661012217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661012017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404358009 + ... + 404358022.

It is an arithmetic number, because the mean of its divisors is an integer number (1617432064).

Almost surely, 2^5661012217 is an apocalyptic number.

It is an amenable number.

5661012217 is a deficient number, since it is larger than the sum of its proper divisors (808716039).

5661012217 is an equidigital number, since it uses as much as digits as its factorization.

5661012217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808716038.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 5661012217 is about 75239.6984111446. The cubic root of 5661012217 is about 1782.2338885950.

The spelling of 5661012217 in words is "five billion, six hundred sixty-one million, twelve thousand, two hundred seventeen".