254288666 has 16 divisors (see below), whose sum is σ = 405412800. Its totient is φ = 119281248.

The previous prime is 254288663. The next prime is 254288693. The reversal of 254288666 is 666882452.

It is a self number, because there is not a number n which added to its sum of digits gives 254288666.

It is not an unprimeable number, because it can be changed into a prime (254288663) 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, 28571 + ... + 36398.

It is an arithmetic number, because the mean of its divisors is an integer number (25338300).

Almost surely, 2^254288666 is an apocalyptic number.

254288666 is a deficient number, since it is larger than the sum of its proper divisors (151124134).

254288666 is a wasteful number, since it uses less digits than its factorization.

254288666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65093.

The product of its digits is 1105920, while the sum is 47.

The square root of 254288666 is about 15946.4311367779. The cubic root of 254288666 is about 633.5423742702.

The spelling of 254288666 in words is "two hundred fifty-four million, two hundred eighty-eight thousand, six hundred sixty-six".