668225801250 has 450 divisors, whose sum is σ = 2182476686247. Its totient is φ = 152321148000.

The previous prime is 668225801249. The next prime is 668225801291. The reversal of 668225801250 is 52108522866.

It is a happy number.

668225801250 is a `hidden beast` number, since 6 + 6 + 8 + 2 + 2 + 580 + 12 + 50 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 154493805249 + 513731996001 = 393057^2 + 716751^2 .

It is a tau number, because it is divible by the number of its divisors (450).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=578025.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 668225801196 and 668225801205.

It is an unprimeable number.

It is a polite number, since it can be written in 224 ways as a sum of consecutive naturals, for example, 1820778567 + ... + 1820778933.

Almost surely, 2^668225801250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668225801250

668225801250 is an abundant number, since it is smaller than the sum of its proper divisors (1514250884997).

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

668225801250 is an frugal number, since it uses more digits than its factorization.

668225801250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 668225801250 in words is "six hundred sixty-eight billion, two hundred twenty-five million, eight hundred one thousand, two hundred fifty".