66868235 has 16 divisors (see below), whose sum is σ = 91839936. Its totient is φ = 45785088.

The previous prime is 66868231. The next prime is 66868237. The reversal of 66868235 is 53286866.

It is a cyclic number.

It is not a de Polignac number, because 66868235 - 2² = 66868231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66868231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39527 + ... + 41183.

It is an arithmetic number, because the mean of its divisors is an integer number (5739996).

Almost surely, 2^66868235 is an apocalyptic number.

66868235 is a deficient number, since it is larger than the sum of its proper divisors (24971701).

66868235 is a wasteful number, since it uses less digits than its factorization.

66868235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822.

The product of its digits is 414720, while the sum is 44.

The square root of 66868235 is about 8177.2999822680. The cubic root of 66868235 is about 405.8883816374. Note that the first 3 decimals are identical.

The spelling of 66868235 in words is "sixty-six million, eight hundred sixty-eight thousand, two hundred thirty-five".