6650164404 has 72 divisors (see below), whose sum is σ = 18139441320. Its totient is φ = 2042111232.

The previous prime is 6650164387. The next prime is 6650164421. The reversal of 6650164404 is 4044610566.

6650164404 is a `hidden beast` number, since 6 + 6 + 5 + 0 + 1 + 644 + 0 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (6650164387) and next prime (6650164421).

It can be written as a sum of positive squares in 4 ways, for example, as 2405902500 + 4244261904 = 49050^2 + 65148^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224254 + ... + 252170.

It is an arithmetic number, because the mean of its divisors is an integer number (251936685).

Almost surely, 2^6650164404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6650164404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9069720660).

6650164404 is an abundant number, since it is smaller than the sum of its proper divisors (11489276916).

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

6650164404 is a wasteful number, since it uses less digits than its factorization.

6650164404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28449 (or 28444 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6650164404 is about 81548.5401708700. The cubic root of 6650164404 is about 1880.5178522877.

The spelling of 6650164404 in words is "six billion, six hundred fifty million, one hundred sixty-four thousand, four hundred four".