66454636 has 12 divisors (see below), whose sum is σ = 121352112. Its totient is φ = 31782608.

The previous prime is 66454621. The next prime is 66454637. The reversal of 66454636 is 63645466.

66454636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66454637) 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 3 ways as a sum of consecutive naturals, for example, 361075 + ... + 361258.

It is an arithmetic number, because the mean of its divisors is an integer number (10112676).

Almost surely, 2^66454636 is an apocalyptic number.

It is an amenable number.

66454636 is a deficient number, since it is larger than the sum of its proper divisors (54897476).

66454636 is a wasteful number, since it uses less digits than its factorization.

66454636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722360 (or 722358 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The square root of 66454636 is about 8151.9712953371. The cubic root of 66454636 is about 405.0498053873.

The spelling of 66454636 in words is "sixty-six million, four hundred fifty-four thousand, six hundred thirty-six".