61663163 has 4 divisors (see below), whose sum is σ = 62056080. Its totient is φ = 61270248.

The previous prime is 61663117. The next prime is 61663169. The reversal of 61663163 is 36136616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61663163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61663169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196223 + ... + 196536.

It is an arithmetic number, because the mean of its divisors is an integer number (15514020).

Almost surely, 2^61663163 is an apocalyptic number.

61663163 is a deficient number, since it is larger than the sum of its proper divisors (392917).

61663163 is a wasteful number, since it uses less digits than its factorization.

61663163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392916.

The product of its digits is 11664, while the sum is 32.

The square root of 61663163 is about 7852.5895728734. The cubic root of 61663163 is about 395.0711040080.

Adding to 61663163 its reverse (36136616), we get a palindrome (97799779).

The spelling of 61663163 in words is "sixty-one million, six hundred sixty-three thousand, one hundred sixty-three".