668570854 has 16 divisors (see below), whose sum is σ = 1195953408. Its totient is φ = 274072392.

The previous prime is 668570839. The next prime is 668570857. The reversal of 668570854 is 458075866.

It is a junction number, because it is equal to n+sod(n) for n = 668570798 and 668570807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668570857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037832 + ... + 1038475.

It is an arithmetic number, because the mean of its divisors is an integer number (74747088).

Almost surely, 2^668570854 is an apocalyptic number.

668570854 is a deficient number, since it is larger than the sum of its proper divisors (527382554).

668570854 is a wasteful number, since it uses less digits than its factorization.

668570854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076339.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The square root of 668570854 is about 25856.7371104708. The cubic root of 668570854 is about 874.4114045330.

The spelling of 668570854 in words is "six hundred sixty-eight million, five hundred seventy thousand, eight hundred fifty-four".