66233855 has 8 divisors (see below), whose sum is σ = 80667312. Its totient is φ = 52195968.

The previous prime is 66233851. The next prime is 66233891. The reversal of 66233855 is 55833266.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66233855 - 2² = 66233851 is a prime.

It is a super-2 number, since 2×66233855² = 8773847096322050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66233851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98522 + ... + 99191.

It is an arithmetic number, because the mean of its divisors is an integer number (10083414).

Almost surely, 2^66233855 is an apocalyptic number.

66233855 is a deficient number, since it is larger than the sum of its proper divisors (14433457).

66233855 is a wasteful number, since it uses less digits than its factorization.

66233855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197785.

The product of its digits is 129600, while the sum is 38.

The square root of 66233855 is about 8138.4184581527. The cubic root of 66233855 is about 404.6007445749.

The spelling of 66233855 in words is "sixty-six million, two hundred thirty-three thousand, eight hundred fifty-five".