255403666 has 16 divisors (see below), whose sum is σ = 438497856. Its totient is φ = 109292976.

The previous prime is 255403663. The next prime is 255403693. The reversal of 255403666 is 666304552.

255403666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (255403663) 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, 3996 + ... + 22951.

It is an arithmetic number, because the mean of its divisors is an integer number (27406116).

Almost surely, 2^255403666 is an apocalyptic number.

255403666 is a deficient number, since it is larger than the sum of its proper divisors (183094190).

255403666 is a wasteful number, since it uses less digits than its factorization.

255403666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27633.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 255403666 is about 15981.3536973562. The cubic root of 255403666 is about 634.4670055785.

The spelling of 255403666 in words is "two hundred fifty-five million, four hundred three thousand, six hundred sixty-six".