166222416 has 80 divisors (see below), whose sum is σ = 440971776. Its totient is φ = 53933568.

The previous prime is 166222367. The next prime is 166222417. The reversal of 166222416 is 614222661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166222417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567166 + ... + 567458.

Almost surely, 2^166222416 is an apocalyptic number.

166222416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166222416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220485888).

166222416 is an abundant number, since it is smaller than the sum of its proper divisors (274749360).

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

166222416 is a wasteful number, since it uses less digits than its factorization.

166222416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 574 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 166222416 is about 12892.7272522147. The cubic root of 166222416 is about 549.8318119348.

The spelling of 166222416 in words is "one hundred sixty-six million, two hundred twenty-two thousand, four hundred sixteen".