5331661 has 2 divisors, whose sum is σ = 5331662. Its totient is φ = 5331660.

The previous prime is 5331649. The next prime is 5331691. The reversal of 5331661 is 1661335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4884100 + 447561 = 2210^2 + 669^2 .

It is a cyclic number.

It is not a de Polignac number, because 5331661 - 2¹³ = 5323469 is a prime.

5331661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5331691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665830 + 2665831.

It is an arithmetic number, because the mean of its divisors is an integer number (2665831).

Almost surely, 2^5331661 is an apocalyptic number.

It is an amenable number.

5331661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5331661 is an equidigital number, since it uses as much as digits as its factorization.

5331661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 5331661 is about 2309.0389775835. The cubic root of 5331661 is about 174.6978295666.

Adding to 5331661 its reverse (1661335), we get a palindrome (6992996).

The spelling of 5331661 in words is "five million, three hundred thirty-one thousand, six hundred sixty-one".