1601116566 has 16 divisors (see below), whose sum is σ = 3659695104. Its totient is φ = 457461864.

The previous prime is 1601116511. The next prime is 1601116631. The reversal of 1601116566 is 6656111061.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19060870 + ... + 19060953.

It is an arithmetic number, because the mean of its divisors is an integer number (228730944).

Almost surely, 2^1601116566 is an apocalyptic number.

1601116566 is an abundant number, since it is smaller than the sum of its proper divisors (2058578538).

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

1601116566 is a wasteful number, since it uses less digits than its factorization.

1601116566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38121835.

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

The square root of 1601116566 is about 40013.9546408500. The cubic root of 1601116566 is about 1169.8791035868.

The spelling of 1601116566 in words is "one billion, six hundred one million, one hundred sixteen thousand, five hundred sixty-six".