660216566800 has 60 divisors (see below), whose sum is σ = 1812766066816. Its totient is φ = 226359964800.

The previous prime is 660216566773. The next prime is 660216566833. The reversal of 660216566800 is 8665612066.

660216566800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×660216566800³ (a number of 36 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117893016 + ... + 117898615.

Almost surely, 2^660216566800 is an apocalyptic number.

It is an amenable number.

660216566800 is an abundant number, since it is smaller than the sum of its proper divisors (1152549500016).

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

660216566800 is a wasteful number, since it uses less digits than its factorization.

660216566800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235791656 (or 235791645 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 660216566800 in words is "six hundred sixty billion, two hundred sixteen million, five hundred sixty-six thousand, eight hundred".