217276668 has 60 divisors (see below), whose sum is σ = 649154352. Its totient is φ = 62078400.

The previous prime is 217276667. The next prime is 217276673. The reversal of 217276668 is 866672712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217276663) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45633 + ... + 50168.

Almost surely, 2^217276668 is an apocalyptic number.

217276668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

217276668 is an abundant number, since it is smaller than the sum of its proper divisors (431877684).

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

217276668 is a wasteful number, since it uses less digits than its factorization.

217276668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95824 (or 95813 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 217276668 is about 14740.3075951623. The cubic root of 217276668 is about 601.1797786833.

The spelling of 217276668 in words is "two hundred seventeen million, two hundred seventy-six thousand, six hundred sixty-eight".