61233661 has 2 divisors, whose sum is σ = 61233662. Its totient is φ = 61233660.

The previous prime is 61233647. The next prime is 61233673. The reversal of 61233661 is 16633216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46648900 + 14584761 = 6830^2 + 3819^2 .

It is a cyclic number.

It is not a de Polignac number, because 61233661 - 2⁵ = 61233629 is a prime.

It is a super-2 number, since 2×61233661² = 7499122478925842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61233961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30616830 + 30616831.

It is an arithmetic number, because the mean of its divisors is an integer number (30616831).

Almost surely, 2^61233661 is an apocalyptic number.

It is an amenable number.

61233661 is a deficient number, since it is larger than the sum of its proper divisors (1).

61233661 is an equidigital number, since it uses as much as digits as its factorization.

61233661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 61233661 is about 7825.1939912056. The cubic root of 61233661 is about 394.1517040588.

Adding to 61233661 its reverse (16633216), we get a palindrome (77866877).

The spelling of 61233661 in words is "sixty-one million, two hundred thirty-three thousand, six hundred sixty-one".