666666552 has 32 divisors (see below), whose sum is σ = 1681422480. Its totient is φ = 220254720.

The previous prime is 666666503. The next prime is 666666557. The reversal of 666666552 is 255666666.

666666552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666666557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120199 + ... + 125622.

Almost surely, 2^666666552 is an apocalyptic number.

It is an amenable number.

666666552 is an abundant number, since it is smaller than the sum of its proper divisors (1014755928).

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

666666552 is a wasteful number, since it uses less digits than its factorization.

666666552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245943 (or 245939 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 48.

The square root of 666666552 is about 25819.8867542056. The cubic root of 666666552 is about 873.5804146510.

The spelling of 666666552 in words is "six hundred sixty-six million, six hundred sixty-six thousand, five hundred fifty-two".