666554452 has 12 divisors (see below), whose sum is σ = 1166722900. Its totient is φ = 333205056.

The previous prime is 666554443. The next prime is 666554453. The reversal of 666554452 is 254455666.

It is a happy number.

666554452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 149719696 + 516834756 = 12236^2 + 22734^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 666554399 and 666554408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666554453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6424 + ... + 37072.

Almost surely, 2^666554452 is an apocalyptic number.

It is an amenable number.

666554452 is a deficient number, since it is larger than the sum of its proper divisors (500168448).

666554452 is a wasteful number, since it uses less digits than its factorization.

666554452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36090 (or 36088 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

The square root of 666554452 is about 25817.7158555903. The cubic root of 666554452 is about 873.5314477157.

The spelling of 666554452 in words is "six hundred sixty-six million, five hundred fifty-four thousand, four hundred fifty-two".