66770568 has 84 divisors (see below), whose sum is σ = 189477015. Its totient is φ = 22048848.

The previous prime is 66770567. The next prime is 66770581. The reversal of 66770568 is 86507766.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 33385284 + 33385284 = 5778^2 + 5778^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5778.

It is not an unprimeable number, because it can be changed into a prime (66770567) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 623971 + ... + 624077.

Almost surely, 2^66770568 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 66770568

66770568 is an abundant number, since it is smaller than the sum of its proper divisors (122706447).

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

66770568 is an equidigital number, since it uses as much as digits as its factorization.

66770568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 66770568 is about 8171.3259633917. The cubic root of 66770568 is about 405.6906733313.

The spelling of 66770568 in words is "sixty-six million, seven hundred seventy thousand, five hundred sixty-eight".