140566165 has 4 divisors (see below), whose sum is σ = 168679404. Its totient is φ = 112452928.

The previous prime is 140566039. The next prime is 140566171. The reversal of 140566165 is 561665041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36505764 + 104060401 = 6042^2 + 10201^2 .

It is a cyclic number.

It is not a de Polignac number, because 140566165 - 2¹³ = 140557973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140566165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14056612 + ... + 14056621.

It is an arithmetic number, because the mean of its divisors is an integer number (42169851).

Almost surely, 2^140566165 is an apocalyptic number.

It is an amenable number.

140566165 is a deficient number, since it is larger than the sum of its proper divisors (28113239).

140566165 is an equidigital number, since it uses as much as digits as its factorization.

140566165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28113238.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 140566165 is about 11856.0602646916. The cubic root of 140566165 is about 519.9484231389.

The spelling of 140566165 in words is "one hundred forty million, five hundred sixty-six thousand, one hundred sixty-five".