216667416 has 48 divisors (see below), whose sum is σ = 630107640. Its totient is φ = 61904640.

The previous prime is 216667391. The next prime is 216667421. The reversal of 216667416 is 614766612.

It is a super-2 number, since 2×216667416² = 93889538312234112, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 90945 + ... + 93296.

Almost surely, 2^216667416 is an apocalyptic number.

It is an amenable number.

216667416 is an abundant number, since it is smaller than the sum of its proper divisors (413440224).

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

216667416 is a wasteful number, since it uses less digits than its factorization.

216667416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184264 (or 184253 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 216667416 is about 14719.6268974455. The cubic root of 216667416 is about 600.6173423739.

It can be divided in two parts, 2166 and 67416, that multiplied together give a square (146023056 = 12084²).

The spelling of 216667416 in words is "two hundred sixteen million, six hundred sixty-seven thousand, four hundred sixteen".