61083661 has 2 divisors, whose sum is σ = 61083662. Its totient is φ = 61083660.

The previous prime is 61083641. The next prime is 61083667. The reversal of 61083661 is 16638016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43494025 + 17589636 = 6595^2 + 4194^2 .

It is a cyclic number.

It is not a de Polignac number, because 61083661 - 2⁵ = 61083629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61083667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30541830 + 30541831.

It is an arithmetic number, because the mean of its divisors is an integer number (30541831).

Almost surely, 2^61083661 is an apocalyptic number.

It is an amenable number.

61083661 is a deficient number, since it is larger than the sum of its proper divisors (1).

61083661 is an equidigital number, since it uses as much as digits as its factorization.

61083661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 61083661 is about 7815.6036874959. The cubic root of 61083661 is about 393.8295985545.

The spelling of 61083661 in words is "sixty-one million, eighty-three thousand, six hundred sixty-one".