66880318 has 16 divisors (see below), whose sum is σ = 101455200. Its totient is φ = 33064416.

The previous prime is 66880313. The next prime is 66880357. The reversal of 66880318 is 81308866.

It is a super-2 number, since 2×66880318² = 8945953871562248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66880313) 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, 77980 + ... + 78832.

It is an arithmetic number, because the mean of its divisors is an integer number (6340950).

Almost surely, 2^66880318 is an apocalyptic number.

66880318 is a deficient number, since it is larger than the sum of its proper divisors (34574882).

66880318 is a wasteful number, since it uses less digits than its factorization.

66880318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 66880318 is about 8178.0387624418. The cubic root of 66880318 is about 405.9128279929.

The spelling of 66880318 in words is "sixty-six million, eight hundred eighty thousand, three hundred eighteen".