61121663 has 2 divisors, whose sum is σ = 61121664. Its totient is φ = 61121662.

The previous prime is 61121569. The next prime is 61121707. The reversal of 61121663 is 36612116.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61121663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61121563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30560831 + 30560832.

It is an arithmetic number, because the mean of its divisors is an integer number (30560832).

Almost surely, 2^61121663 is an apocalyptic number.

61121663 is a deficient number, since it is larger than the sum of its proper divisors (1).

61121663 is an equidigital number, since it uses as much as digits as its factorization.

61121663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 61121663 is about 7818.0344716559. The cubic root of 61121663 is about 393.9112527403.

Adding to 61121663 its reverse (36612116), we get a palindrome (97733779).

The spelling of 61121663 in words is "sixty-one million, one hundred twenty-one thousand, six hundred sixty-three".