66950858 has 16 divisors (see below), whose sum is σ = 108573696. Its totient is φ = 30779760.

The previous prime is 66950857. The next prime is 66950881. The reversal of 66950858 is 85805966.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66950857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943 + ... + 11733.

It is an arithmetic number, because the mean of its divisors is an integer number (6785856).

Almost surely, 2^66950858 is an apocalyptic number.

66950858 is a deficient number, since it is larger than the sum of its proper divisors (41622838).

66950858 is a wasteful number, since it uses less digits than its factorization.

66950858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10069.

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 66950858 is about 8182.3503958215. The cubic root of 66950858 is about 406.0554859577.

The spelling of 66950858 in words is "sixty-six million, nine hundred fifty thousand, eight hundred fifty-eight".