1000650665 has 32 divisors (see below), whose sum is σ = 1393666560. Its totient is φ = 675569664.

The previous prime is 1000650661. The next prime is 1000650667. The reversal of 1000650665 is 5660560001.

It is not a de Polignac number, because 1000650665 - 2² = 1000650661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000650661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 709481 + ... + 710889.

It is an arithmetic number, because the mean of its divisors is an integer number (43552080).

Almost surely, 2^1000650665 is an apocalyptic number.

It is an amenable number.

1000650665 is a deficient number, since it is larger than the sum of its proper divisors (393015895).

1000650665 is a wasteful number, since it uses less digits than its factorization.

1000650665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 1000650665 is about 31633.0628456999. The cubic root of 1000650665 is about 1000.2168413098.

The spelling of 1000650665 in words is "one billion, six hundred fifty thousand, six hundred sixty-five".