66654858 has 32 divisors (see below), whose sum is σ = 142425216. Its totient is φ = 20722688.

The previous prime is 66654857. The next prime is 66654881. The reversal of 66654858 is 85845666.

It is a happy number.

66654858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66654857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8635 + ... + 14417.

It is an arithmetic number, because the mean of its divisors is an integer number (4450788).

Almost surely, 2^66654858 is an apocalyptic number.

66654858 is an abundant number, since it is smaller than the sum of its proper divisors (75770358).

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

66654858 is a wasteful number, since it uses less digits than its factorization.

66654858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5918.

The product of its digits is 1382400, while the sum is 48.

The square root of 66654858 is about 8164.2426470555. The cubic root of 66654858 is about 405.4561907259.

The spelling of 66654858 in words is "sixty-six million, six hundred fifty-four thousand, eight hundred fifty-eight".