668710560 has 96 divisors (see below), whose sum is σ = 2407370112. Its totient is φ = 152847360.

The previous prime is 668710547. The next prime is 668710561. The reversal of 668710560 is 65017866.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (668710561) 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 15 ways as a sum of consecutive naturals, for example, 96151 + ... + 102870.

It is an arithmetic number, because the mean of its divisors is an integer number (25076772).

Almost surely, 2^668710560 is an apocalyptic number.

668710560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668710560 is an abundant number, since it is smaller than the sum of its proper divisors (1738659552).

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

668710560 is a wasteful number, since it uses less digits than its factorization.

668710560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199046 (or 199038 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 668710560 is about 25859.4385089855. The cubic root of 668710560 is about 874.4723065855.

The spelling of 668710560 in words is "six hundred sixty-eight million, seven hundred ten thousand, five hundred sixty".