216666669076 has 24 divisors (see below), whose sum is σ = 445454551584. Its totient is φ = 90909091680.

The previous prime is 216666669067. The next prime is 216666669091. The reversal of 216666669076 is 670966666612.

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, 189393370 + ... + 189394513.

It is an arithmetic number, because the mean of its divisors is an integer number (18560606316).

Almost surely, 2^216666669076 is an apocalyptic number.

216666669076 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

216666669076 is an abundant number, since it is smaller than the sum of its proper divisors (228787882508).

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

216666669076 is a wasteful number, since it uses less digits than its factorization.

216666669076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378787911 (or 378787909 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 61.

The spelling of 216666669076 in words is "two hundred sixteen billion, six hundred sixty-six million, six hundred sixty-nine thousand, seventy-six".