668403462 has 64 divisors (see below), whose sum is σ = 1408942080. Its totient is φ = 211140000.

The previous prime is 668403371. The next prime is 668403487. The reversal of 668403462 is 264304866.

668403462 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 668403462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2662837 + ... + 2663087.

It is an arithmetic number, because the mean of its divisors is an integer number (22014720).

Almost surely, 2^668403462 is an apocalyptic number.

668403462 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a pronic number, being equal to 25853×25854.

668403462 is an abundant number, since it is smaller than the sum of its proper divisors (740538618).

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

668403462 is a wasteful number, since it uses less digits than its factorization.

668403462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 165888, while the sum is 39.

The square root of 668403462 is about 25853.4999951651. The cubic root of 668403462 is about 874.3384221456.

The spelling of 668403462 in words is "six hundred sixty-eight million, four hundred three thousand, four hundred sixty-two".