66047858 has 16 divisors (see below), whose sum is σ = 105333696. Its totient is φ = 30990960.

The previous prime is 66047851. The next prime is 66047893. The reversal of 66047858 is 85874066.

It is not an unprimeable number, because it can be changed into a prime (66047851) 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, 11108 + ... + 15983.

It is an arithmetic number, because the mean of its divisors is an integer number (6583356).

Almost surely, 2^66047858 is an apocalyptic number.

66047858 is a deficient number, since it is larger than the sum of its proper divisors (39285838).

66047858 is a wasteful number, since it uses less digits than its factorization.

66047858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27169.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 66047858 is about 8126.9833271639. The cubic root of 66047858 is about 404.2216580906.

The spelling of 66047858 in words is "sixty-six million, forty-seven thousand, eight hundred fifty-eight".