66769608 has 64 divisors (see below), whose sum is σ = 181560960. Its totient is φ = 20376576.

The previous prime is 66769603. The next prime is 66769609. The reversal of 66769608 is 80696766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66769601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12885 + ... + 17307.

It is an arithmetic number, because the mean of its divisors is an integer number (2836890).

Almost surely, 2^66769608 is an apocalyptic number.

66769608 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66769608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90780480).

66769608 is an abundant number, since it is smaller than the sum of its proper divisors (114791352).

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

66769608 is a wasteful number, since it uses less digits than its factorization.

66769608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486 (or 4482 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 66769608 is about 8171.2672211842. The cubic root of 66769608 is about 405.6887290370.

The spelling of 66769608 in words is "sixty-six million, seven hundred sixty-nine thousand, six hundred eight".