61020017106663 has 16 divisors (see below), whose sum is σ = 81478727735936. Its totient is φ = 40620660334560.

The previous prime is 61020017106641. The next prime is 61020017106691. The reversal of 61020017106663 is 36660171002016.

It is not a de Polignac number, because 61020017106663 - 2²⁸ = 61019748671207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61020017106463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301982781 + ... + 302184777.

It is an arithmetic number, because the mean of its divisors is an integer number (5092420483496).

Almost surely, 2^{61020017106663} is an apocalyptic number.

61020017106663 is a deficient number, since it is larger than the sum of its proper divisors (20458710629273).

61020017106663 is a wasteful number, since it uses less digits than its factorization.

61020017106663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348414.

The product of its (nonzero) digits is 54432, while the sum is 39.

Adding to 61020017106663 its reverse (36660171002016), we get a palindrome (97680188108679).

The spelling of 61020017106663 in words is "sixty-one trillion, twenty billion, seventeen million, one hundred six thousand, six hundred sixty-three".