650106666 has 48 divisors (see below), whose sum is σ = 1545579360. Its totient is φ = 195852960.

The previous prime is 650106649. The next prime is 650106703. The reversal of 650106666 is 666601056.

It is a self number, because there is not a number n which added to its sum of digits gives 650106666.

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, 24765 + ... + 43743.

It is an arithmetic number, because the mean of its divisors is an integer number (32199570).

Almost surely, 2^650106666 is an apocalyptic number.

650106666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 650106666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772789680).

650106666 is an abundant number, since it is smaller than the sum of its proper divisors (895472694).

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

650106666 is a wasteful number, since it uses less digits than its factorization.

650106666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19171 (or 19168 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 650106666 is about 25497.1893745173. The cubic root of 650106666 is about 866.2864864725.

The spelling of 650106666 in words is "six hundred fifty million, one hundred six thousand, six hundred sixty-six".