661607567106 has 16 divisors (see below), whose sum is σ = 1330525717248. Its totient is φ = 219317425200.

The previous prime is 661607567099. The next prime is 661607567107. The reversal of 661607567106 is 601765706166.

It is not an unprimeable number, because it can be changed into a prime (661607567107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304606450 + ... + 304608621.

It is an arithmetic number, because the mean of its divisors is an integer number (83157857328).

Almost surely, 2^661607567106 is an apocalyptic number.

661607567106 is an abundant number, since it is smaller than the sum of its proper divisors (668918150142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661607567106 is a wasteful number, since it uses less digits than its factorization.

661607567106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609215257.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 661607567106 in words is "six hundred sixty-one billion, six hundred seven million, five hundred sixty-seven thousand, one hundred six".