666662000 has 40 divisors (see below), whose sum is σ = 1611993552. Its totient is φ = 266664000.

The previous prime is 666661991. The next prime is 666662011. The reversal of 666662000 is 266666.

It is a tau number, because it is divible by the number of its divisors (40).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164666 + ... + 168665.

Almost surely, 2^666662000 is an apocalyptic number.

It is an amenable number.

666662000 is an abundant number, since it is smaller than the sum of its proper divisors (945331552).

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

666662000 is a wasteful number, since it uses less digits than its factorization.

666662000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333354 (or 333338 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 666662000 is about 25819.7986049466. The cubic root of 666662000 is about 873.5784263771.

The spelling of 666662000 in words is "six hundred sixty-six million, six hundred sixty-two thousand".