666226064 has 20 divisors (see below), whose sum is σ = 1475215104. Its totient is φ = 285525408.

The previous prime is 666226031. The next prime is 666226087. The reversal of 666226064 is 460622666.

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, 2974112 + ... + 2974335.

Almost surely, 2^666226064 is an apocalyptic number.

It is an amenable number.

666226064 is an abundant number, since it is smaller than the sum of its proper divisors (808989040).

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

666226064 is a wasteful number, since it uses less digits than its factorization.

666226064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5948462 (or 5948456 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 666226064 is about 25811.3553305517. The cubic root of 666226064 is about 873.3879713824.

The spelling of 666226064 in words is "six hundred sixty-six million, two hundred twenty-six thousand, sixty-four".