66288266 has 32 divisors (see below), whose sum is σ = 111585600. Its totient is φ = 29278080.

The previous prime is 66288263. The next prime is 66288289.

It is a happy number.

66288266 is nontrivially palindromic in base 10.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66288263) 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, 161870 + ... + 162278.

It is an arithmetic number, because the mean of its divisors is an integer number (3487050).

Almost surely, 2^66288266 is an apocalyptic number.

66288266 is a deficient number, since it is larger than the sum of its proper divisors (45297334).

66288266 is a wasteful number, since it uses less digits than its factorization.

66288266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614.

The product of its digits is 331776, while the sum is 44.

The square root of 66288266 is about 8141.7606204064. The cubic root of 66288266 is about 404.7115071927.

The spelling of 66288266 in words is "sixty-six million, two hundred eighty-eight thousand, two hundred sixty-six".