66664454 has 16 divisors (see below), whose sum is σ = 104446800. Its totient is φ = 31879584.

The previous prime is 66664453. The next prime is 66664457. The reversal of 66664454 is 45446666.

66664454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66664453) 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 7 ways as a sum of consecutive naturals, for example, 3269 + ... + 12000.

It is an arithmetic number, because the mean of its divisors is an integer number (6527925).

Almost surely, 2^66664454 is an apocalyptic number.

66664454 is a deficient number, since it is larger than the sum of its proper divisors (37782346).

66664454 is a wasteful number, since it uses less digits than its factorization.

66664454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15367.

The product of its digits is 414720, while the sum is 41.

The square root of 66664454 is about 8164.8303105453. The cubic root of 66664454 is about 405.4756470267.

The spelling of 66664454 in words is "sixty-six million, six hundred sixty-four thousand, four hundred fifty-four".