668560410 has 288 divisors, whose sum is σ = 2176761600. Its totient is φ = 141523200.

The previous prime is 668560397. The next prime is 668560421. The reversal of 668560410 is 14065866.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6619360 + ... + 6619460.

It is an arithmetic number, because the mean of its divisors is an integer number (7558200).

Almost surely, 2^668560410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668560410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1088380800).

668560410 is an abundant number, since it is smaller than the sum of its proper divisors (1508201190).

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

668560410 is a wasteful number, since it uses less digits than its factorization.

668560410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 668560410 is about 25856.5351507119. The cubic root of 668560410 is about 874.4068513381.

The spelling of 668560410 in words is "six hundred sixty-eight million, five hundred sixty thousand, four hundred ten".