1655566165 has 24 divisors (see below), whose sum is σ = 2312173080. Its totient is φ = 1133214720.

The previous prime is 1655566153. The next prime is 1655566189. The reversal of 1655566165 is 5616655561.

It can be written as a sum of positive squares in 4 ways, for example, as 146942884 + 1508623281 = 12122^2 + 38841^2 .

It is not a de Polignac number, because 1655566165 - 2¹³ = 1655557973 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 70200 + ... + 90769.

It is an arithmetic number, because the mean of its divisors is an integer number (96340545).

Almost surely, 2^1655566165 is an apocalyptic number.

It is an amenable number.

1655566165 is a deficient number, since it is larger than the sum of its proper divisors (656606915).

1655566165 is a wasteful number, since it uses less digits than its factorization.

1655566165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161013 (or 161002 counting only the distinct ones).

The product of its digits is 810000, while the sum is 46.

The square root of 1655566165 is about 40688.6490928367. The cubic root of 1655566165 is about 1182.9930159810.

The spelling of 1655566165 in words is "one billion, six hundred fifty-five million, five hundred sixty-six thousand, one hundred sixty-five".