1000165061566 has 32 divisors (see below), whose sum is σ = 1639151186400. Its totient is φ = 453921561600.

The previous prime is 1000165061561. The next prime is 1000165061569. The reversal of 1000165061566 is 6651605610001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000165061561) 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, 73270710 + ... + 73284358.

It is an arithmetic number, because the mean of its divisors is an integer number (51223474575).

Almost surely, 2^{1000165061566} is an apocalyptic number.

1000165061566 is a deficient number, since it is larger than the sum of its proper divisors (638986124834).

1000165061566 is a wasteful number, since it uses less digits than its factorization.

1000165061566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18540.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 1000165061566 in words is "one trillion, one hundred sixty-five million, sixty-one thousand, five hundred sixty-six".