66667268 has 12 divisors (see below), whose sum is σ = 123530652. Its totient is φ = 31372800.

The previous prime is 66667261. The next prime is 66667277. The reversal of 66667268 is 86276666.

It can be written as a sum of positive squares in 2 ways, for example, as 24780484 + 41886784 = 4978^2 + 6472^2 .

It is not an unprimeable number, because it can be changed into a prime (66667261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490133 + ... + 490268.

It is an arithmetic number, because the mean of its divisors is an integer number (10294221).

Almost surely, 2^66667268 is an apocalyptic number.

66667268 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66667268 is a deficient number, since it is larger than the sum of its proper divisors (56863384).

66667268 is a wasteful number, since it uses less digits than its factorization.

66667268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980422 (or 980420 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 66667268 is about 8165.0026331900. The cubic root of 66667268 is about 405.4813521782.

The spelling of 66667268 in words is "sixty-six million, six hundred sixty-seven thousand, two hundred sixty-eight".