66253838 has 8 divisors (see below), whose sum is σ = 113578032. Its totient is φ = 28394496.

The previous prime is 66253819. The next prime is 66253849. The reversal of 66253838 is 83835266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66253795 and 66253804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2366195 + ... + 2366222.

It is an arithmetic number, because the mean of its divisors is an integer number (14197254).

Almost surely, 2^66253838 is an apocalyptic number.

66253838 is a deficient number, since it is larger than the sum of its proper divisors (47324194).

66253838 is a wasteful number, since it uses less digits than its factorization.

66253838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732426.

The product of its digits is 207360, while the sum is 41.

The square root of 66253838 is about 8139.6460611012. The cubic root of 66253838 is about 404.6414303325.

The spelling of 66253838 in words is "sixty-six million, two hundred fifty-three thousand, eight hundred thirty-eight".