666796608 has 168 divisors, whose sum is σ = 1997049600. Its totient is φ = 212474880.

The previous prime is 666796601. The next prime is 666796619. The reversal of 666796608 is 806697666.

It is not an unprimeable number, because it can be changed into a prime (666796601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1910418 + ... + 1910766.

It is an arithmetic number, because the mean of its divisors is an integer number (11887200).

Almost surely, 2^666796608 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 666796608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998524800).

666796608 is an abundant number, since it is smaller than the sum of its proper divisors (1330252992).

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

666796608 is a wasteful number, since it uses less digits than its factorization.

666796608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The square root of 666796608 is about 25822.4051552136. The cubic root of 666796608 is about 873.6372181543.

It can be divided in two parts, 66 and 6796608, that multiplied together give a triangular number (448576128 = T₂₉₉₅₂).

The spelling of 666796608 in words is "six hundred sixty-six million, seven hundred ninety-six thousand, six hundred eight".