650161661000 has 64 divisors (see below), whose sum is σ = 1529101482480. Its totient is φ = 258744460800.

The previous prime is 650161660999. The next prime is 650161661077. The reversal of 650161661000 is 166161056.

It can be written as a sum of positive squares in 8 ways, for example, as 33085427236 + 617076233764 = 181894^2 + 785542^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1453157 + ... + 1847156.

Almost surely, 2^650161661000 is an apocalyptic number.

It is an amenable number.

650161661000 is an abundant number, since it is smaller than the sum of its proper divisors (878939821480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

650161661000 is a wasteful number, since it uses less digits than its factorization.

650161661000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300531 (or 3300517 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 650161661000 in words is "six hundred fifty billion, one hundred sixty-one million, six hundred sixty-one thousand".