258666815897340 has 48 divisors (see below), whose sum is σ = 724553243406720. Its totient is φ = 68950564344640.

The previous prime is 258666815897173. The next prime is 258666815897419. The reversal of 258666815897340 is 43798518666852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 851510250 + ... + 851813969.

It is an arithmetic number, because the mean of its divisors is an integer number (15094859237640).

It is a 1-persistent number, because it is pandigital, but 2⋅258666815897340 = 517333631794680 is not.

Almost surely, 2^{258666815897340} is an apocalyptic number.

258666815897340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

258666815897340 is an abundant number, since it is smaller than the sum of its proper divisors (465886427509380).

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

258666815897340 is a wasteful number, since it uses less digits than its factorization.

258666815897340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703326762 (or 1703326760 counting only the distinct ones).

The product of its (nonzero) digits is 4180377600, while the sum is 78.

The spelling of 258666815897340 in words is "two hundred fifty-eight trillion, six hundred sixty-six billion, eight hundred fifteen million, eight hundred ninety-seven thousand, three hundred forty".