61884661 has 2 divisors, whose sum is σ = 61884662. Its totient is φ = 61884660.

The previous prime is 61884631. The next prime is 61884673. The reversal of 61884661 is 16648816.

61884661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46321636 + 15563025 = 6806^2 + 3945^2 .

It is a cyclic number.

It is not a de Polignac number, because 61884661 - 2⁵ = 61884629 is a prime.

It is a super-2 number, since 2×61884661² = 7659422534169842, 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 (61884601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30942330 + 30942331.

It is an arithmetic number, because the mean of its divisors is an integer number (30942331).

Almost surely, 2^61884661 is an apocalyptic number.

It is an amenable number.

61884661 is a deficient number, since it is larger than the sum of its proper divisors (1).

61884661 is an equidigital number, since it uses as much as digits as its factorization.

61884661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 61884661 is about 7866.6804307789. The cubic root of 61884661 is about 395.5435789092.

The spelling of 61884661 in words is "sixty-one million, eight hundred eighty-four thousand, six hundred sixty-one".