668457066 has 8 divisors (see below), whose sum is σ = 1336914144. Its totient is φ = 222819020.

The previous prime is 668457043. The next prime is 668457091. The reversal of 668457066 is 660754866.

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

668457066 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55704750 + ... + 55704761.

It is an arithmetic number, because the mean of its divisors is an integer number (167114268).

Almost surely, 2^668457066 is an apocalyptic number.

668457066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

668457066 is a wasteful number, since it uses less digits than its factorization.

668457066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111409516.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The square root of 668457066 is about 25854.5366618704. The cubic root of 668457066 is about 874.3617946477.

The spelling of 668457066 in words is "six hundred sixty-eight million, four hundred fifty-seven thousand, sixty-six".