255066663 has 4 divisors (see below), whose sum is σ = 340088888. Its totient is φ = 170044440.

The previous prime is 255066661. The next prime is 255066683. The reversal of 255066663 is 366660552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255066663 - 2¹ = 255066661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255066661) 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, 42511108 + ... + 42511113.

It is an arithmetic number, because the mean of its divisors is an integer number (85022222).

Almost surely, 2^255066663 is an apocalyptic number.

255066663 is a deficient number, since it is larger than the sum of its proper divisors (85022225).

255066663 is an equidigital number, since it uses as much as digits as its factorization.

255066663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85022224.

The product of its (nonzero) digits is 194400, while the sum is 39.

The square root of 255066663 is about 15970.8065857677. The cubic root of 255066663 is about 634.1878247821.

The spelling of 255066663 in words is "two hundred fifty-five million, sixty-six thousand, six hundred sixty-three".