216707571660 has 24 divisors (see below), whose sum is σ = 606781200816. Its totient is φ = 57788685760.

The previous prime is 216707571653. The next prime is 216707571683. The reversal of 216707571660 is 66175707612.

It is a super-2 number, since 2×216707571660² (a number of 23 digits) contains 22 as substring.

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, 1805896371 + ... + 1805896490.

It is an arithmetic number, because the mean of its divisors is an integer number (25282550034).

Almost surely, 2^216707571660 is an apocalyptic number.

216707571660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216707571660 is an abundant number, since it is smaller than the sum of its proper divisors (390073629156).

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

216707571660 is a wasteful number, since it uses less digits than its factorization.

216707571660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611792873 (or 3611792871 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 48.

The spelling of 216707571660 in words is "two hundred sixteen billion, seven hundred seven million, five hundred seventy-one thousand, six hundred sixty".