66450204 has 36 divisors (see below), whose sum is σ = 168386400. Its totient is φ = 22095360.

The previous prime is 66450203. The next prime is 66450211. The reversal of 66450204 is 40205466.

It is a happy number.

66450204 is a `hidden beast` number, since 6 + 6 + 450 + 204 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×66450204² = 8831259223283232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66450203) 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 11 ways as a sum of consecutive naturals, for example, 14109 + ... + 18219.

It is an arithmetic number, because the mean of its divisors is an integer number (4677400).

Almost surely, 2^66450204 is an apocalyptic number.

It is an amenable number.

66450204 is an abundant number, since it is smaller than the sum of its proper divisors (101936196).

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

66450204 is a wasteful number, since it uses less digits than its factorization.

66450204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570 (or 4565 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 66450204 is about 8151.6994547149. The cubic root of 66450204 is about 405.0408006449.

The spelling of 66450204 in words is "sixty-six million, four hundred fifty thousand, two hundred four".