66366368 has 24 divisors (see below), whose sum is σ = 138345732. Its totient is φ = 31230976.

The previous prime is 66366367. The next prime is 66366389. The reversal of 66366368 is 86366366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 51093904 + 15272464 = 7148^2 + 3908^2 .

It is a super-2 number, since 2×66366368² = 8808989603022848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66366367) 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, 60455 + ... + 61542.

Almost surely, 2^66366368 is an apocalyptic number.

66366368 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66366368 is an abundant number, since it is smaller than the sum of its proper divisors (71979364).

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

66366368 is a wasteful number, since it uses less digits than its factorization.

66366368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122024 (or 122016 counting only the distinct ones).

The product of its digits is 559872, while the sum is 44.

The square root of 66366368 is about 8146.5555911686. Note that the first 4 decimals coincide. The cubic root of 66366368 is about 404.8703908794.

The spelling of 66366368 in words is "sixty-six million, three hundred sixty-six thousand, three hundred sixty-eight".