258066866 has 8 divisors (see below), whose sum is σ = 389566380. Its totient is φ = 128211408.

The previous prime is 258066863. The next prime is 258066869. The reversal of 258066866 is 668660852.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (258066863) and next prime (258066869).

It can be written as a sum of positive squares in 2 ways, for example, as 244265641 + 13801225 = 15629^2 + 3715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 258066866.

It is not an unprimeable number, because it can be changed into a prime (258066863) 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, 410621 + ... + 411248.

Almost surely, 2^258066866 is an apocalyptic number.

258066866 is a deficient number, since it is larger than the sum of its proper divisors (131499514).

258066866 is a wasteful number, since it uses less digits than its factorization.

258066866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822028.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 258066866 is about 16064.4597170275. The cubic root of 258066866 is about 636.6646681162.

The spelling of 258066866 in words is "two hundred fifty-eight million, sixty-six thousand, eight hundred sixty-six".