66253338 has 12 divisors (see below), whose sum is σ = 143548938. Its totient is φ = 22084440.

The previous prime is 66253333. The next prime is 66253349. The reversal of 66253338 is 83335266.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66048129 + 205209 = 8127^2 + 453^2 .

It is a super-2 number, since 2×66253338² = 8779009592284488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66253331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1840353 + ... + 1840388.

Almost surely, 2^66253338 is an apocalyptic number.

66253338 is an abundant number, since it is smaller than the sum of its proper divisors (77295600).

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

66253338 is a wasteful number, since it uses less digits than its factorization.

66253338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680749 (or 3680746 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 66253338 is about 8139.6153471770. The cubic root of 66253338 is about 404.6404124231.

The spelling of 66253338 in words is "sixty-six million, two hundred fifty-three thousand, three hundred thirty-eight".