66868466 has 16 divisors (see below), whose sum is σ = 114736704. Its totient is φ = 28631664.

The previous prime is 66868453. The next prime is 66868469. The reversal of 66868466 is 66486866.

It is not an unprimeable number, because it can be changed into a prime (66868469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28016 + ... + 30308.

It is an arithmetic number, because the mean of its divisors is an integer number (7171044).

Almost surely, 2^66868466 is an apocalyptic number.

66868466 is a deficient number, since it is larger than the sum of its proper divisors (47868238).

66868466 is a wasteful number, since it uses less digits than its factorization.

66868466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4385.

The product of its digits is 1990656, while the sum is 50.

The square root of 66868466 is about 8177.3141067223. The cubic root of 66868466 is about 405.8888490248. Note that the first 4 decimals are identical.

It can be divided in two parts, 668684 and 66, that multiplied together give a palindrome (44133144).

The spelling of 66868466 in words is "sixty-six million, eight hundred sixty-eight thousand, four hundred sixty-six".