255666612 has 12 divisors (see below), whose sum is σ = 596555456. Its totient is φ = 85222200.

The previous prime is 255666599. The next prime is 255666623. The reversal of 255666612 is 216666552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10652764 + ... + 10652787.

Almost surely, 2^255666612 is an apocalyptic number.

It is an amenable number.

255666612 is an abundant number, since it is smaller than the sum of its proper divisors (340888844).

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

255666612 is a wasteful number, since it uses less digits than its factorization.

255666612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21305558 (or 21305556 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 255666612 is about 15989.5782308352. The cubic root of 255666612 is about 634.6846653902.

The spelling of 255666612 in words is "two hundred fifty-five million, six hundred sixty-six thousand, six hundred twelve".