661060111063 has 12 divisors (see below), whose sum is σ = 744342231024. Its totient is φ = 586306080800.

The previous prime is 661060111051. The next prime is 661060111069. The reversal of 661060111063 is 360111060166.

661060111063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 661060111063 - 2⁵ = 661060111031 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 (661060111069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66620731 + ... + 66630652.

It is an arithmetic number, because the mean of its divisors is an integer number (62028519252).

Almost surely, 2^661060111063 is an apocalyptic number.

661060111063 is a deficient number, since it is larger than the sum of its proper divisors (83282119961).

661060111063 is a wasteful number, since it uses less digits than its factorization.

661060111063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133251446 (or 133251435 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 661060111063 in words is "six hundred sixty-one billion, sixty million, one hundred eleven thousand, sixty-three".