5611662421 has 2 divisors, whose sum is σ = 5611662422. Its totient is φ = 5611662420.

The previous prime is 5611662389. The next prime is 5611662467. The reversal of 5611662421 is 1242661165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2993293521 + 2618368900 = 54711^2 + 51170^2 .

It is a cyclic number.

It is not a de Polignac number, because 5611662421 - 2⁵ = 5611662389 is a prime.

It is a super-3 number, since 3×5611662421³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5611668421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805831210 + 2805831211.

It is an arithmetic number, because the mean of its divisors is an integer number (2805831211).

Almost surely, 2^5611662421 is an apocalyptic number.

It is an amenable number.

5611662421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5611662421 is an equidigital number, since it uses as much as digits as its factorization.

5611662421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 5611662421 is about 74911.0300356363. The cubic root of 5611662421 is about 1777.0398999316.

The spelling of 5611662421 in words is "five billion, six hundred eleven million, six hundred sixty-two thousand, four hundred twenty-one".