66455994 has 32 divisors (see below), whose sum is σ = 149999040. Its totient is φ = 19443200.

The previous prime is 66455969. The next prime is 66455999. The reversal of 66455994 is 49955466.

It is not an unprimeable number, because it can be changed into a prime (66455999) 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, 15447 + ... + 19274.

It is an arithmetic number, because the mean of its divisors is an integer number (4687470).

Almost surely, 2^66455994 is an apocalyptic number.

66455994 is an abundant number, since it is smaller than the sum of its proper divisors (83543046).

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

66455994 is a wasteful number, since it uses less digits than its factorization.

66455994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34766.

The product of its digits is 1166400, while the sum is 48.

The square root of 66455994 is about 8152.0545876484. The cubic root of 66455994 is about 405.0525644318.

The spelling of 66455994 in words is "sixty-six million, four hundred fifty-five thousand, nine hundred ninety-four".