5612016661 has 2 divisors, whose sum is σ = 5612016662. Its totient is φ = 5612016660.

The previous prime is 5612016649. The next prime is 5612016689. The reversal of 5612016661 is 1666102165.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4829416036 + 782600625 = 69494^2 + 27975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5612016661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5612016691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2806008330 + 2806008331.

It is an arithmetic number, because the mean of its divisors is an integer number (2806008331).

Almost surely, 2^5612016661 is an apocalyptic number.

It is an amenable number.

5612016661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5612016661 is an equidigital number, since it uses as much as digits as its factorization.

5612016661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 5612016661 is about 74913.3944031373. The cubic root of 5612016661 is about 1777.0772914281.

The spelling of 5612016661 in words is "five billion, six hundred twelve million, sixteen thousand, six hundred sixty-one".