16466421 has 8 divisors (see below), whose sum is σ = 23246784. Its totient is φ = 10331840.

The previous prime is 16466419. The next prime is 16466449. The reversal of 16466421 is 12466461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16466421 - 2¹ = 16466419 is a prime.

It is a super-2 number, since 2×16466421² = 542286041098482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16466491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161385 + ... + 161486.

It is an arithmetic number, because the mean of its divisors is an integer number (2905848).

Almost surely, 2^16466421 is an apocalyptic number.

It is an amenable number.

16466421 is a deficient number, since it is larger than the sum of its proper divisors (6780363).

16466421 is a wasteful number, since it uses less digits than its factorization.

16466421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322891.

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

The square root of 16466421 is about 4057.8838080951. The cubic root of 16466421 is about 254.4093519119.

The spelling of 16466421 in words is "sixteen million, four hundred sixty-six thousand, four hundred twenty-one".