661011166050 has 96 divisors (see below), whose sum is σ = 1704925996800. Its totient is φ = 169334530560.

The previous prime is 661011166031. The next prime is 661011166097. The reversal of 661011166050 is 50661110166.

661011166050 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 315355 + ... + 1192254.

It is an arithmetic number, because the mean of its divisors is an integer number (17759645800).

Almost surely, 2^661011166050 is an apocalyptic number.

661011166050 is an abundant number, since it is smaller than the sum of its proper divisors (1043914830750).

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

661011166050 is a wasteful number, since it uses less digits than its factorization.

661011166050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507740 (or 1507735 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The spelling of 661011166050 in words is "six hundred sixty-one billion, eleven million, one hundred sixty-six thousand, fifty".