66850746 has 32 divisors (see below), whose sum is σ = 137543616. Its totient is φ = 21648000.

The previous prime is 66850739. The next prime is 66850747. The reversal of 66850746 is 64705866.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66850698 and 66850707.

It is not an unprimeable number, because it can be changed into a prime (66850747) 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 15 ways as a sum of consecutive naturals, for example, 81016 + ... + 81836.

It is an arithmetic number, because the mean of its divisors is an integer number (4298238).

Almost surely, 2^66850746 is an apocalyptic number.

66850746 is an abundant number, since it is smaller than the sum of its proper divisors (70692870).

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

66850746 is a wasteful number, since it uses less digits than its factorization.

66850746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 66850746 is about 8176.2305495870. The cubic root of 66850746 is about 405.8529926326.

The spelling of 66850746 in words is "sixty-six million, eight hundred fifty thousand, seven hundred forty-six".