666769068 has 108 divisors (see below), whose sum is σ = 1967408352. Its totient is φ = 189846720.

The previous prime is 666769013. The next prime is 666769069. The reversal of 666769068 is 860967666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (666769069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 759846 + ... + 760722.

It is an arithmetic number, because the mean of its divisors is an integer number (18216744).

Almost surely, 2^666769068 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 666769068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983704176).

666769068 is an abundant number, since it is smaller than the sum of its proper divisors (1300639284).

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

666769068 is a wasteful number, since it uses less digits than its factorization.

666769068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 1320 counting only the distinct ones).

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

The square root of 666769068 is about 25821.8718918672. The cubic root of 666769068 is about 873.6251903486.

The spelling of 666769068 in words is "six hundred sixty-six million, seven hundred sixty-nine thousand, sixty-eight".