1650651665 has 16 divisors (see below), whose sum is σ = 2163200256. Its totient is φ = 1201771200.

The previous prime is 1650651641. The next prime is 1650651671. The reversal of 1650651665 is 5661560561.

It is not a de Polignac number, because 1650651665 - 2¹⁰ = 1650650641 is a prime.

It is a Duffinian number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 174221 + ... + 183450.

It is an arithmetic number, because the mean of its divisors is an integer number (135200016).

Almost surely, 2^1650651665 is an apocalyptic number.

It is an amenable number.

1650651665 is a deficient number, since it is larger than the sum of its proper divisors (512548591).

1650651665 is a wasteful number, since it uses less digits than its factorization.

1650651665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357760.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 1650651665 is about 40628.2126729690. The cubic root of 1650651665 is about 1181.8212956911.

The spelling of 1650651665 in words is "one billion, six hundred fifty million, six hundred fifty-one thousand, six hundred sixty-five".