16466021 has 16 divisors (see below), whose sum is σ = 19535040. Its totient is φ = 13681920.

The previous prime is 16465973. The next prime is 16466029. The reversal of 16466021 is 12066461.

It is a happy number.

16466021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16466021 - 2¹⁸ = 16203877 is a prime.

It is a super-2 number, since 2×16466021² = 542259695144882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16466029) 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, 15650 + ... + 16668.

It is an arithmetic number, because the mean of its divisors is an integer number (1220940).

Almost surely, 2^16466021 is an apocalyptic number.

16466021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16466021 is a deficient number, since it is larger than the sum of its proper divisors (3069019).

16466021 is a wasteful number, since it uses less digits than its factorization.

16466021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 16466021 is about 4057.8345210223. The cubic root of 16466021 is about 254.4072918697.

It can be divided in two parts, 1646 and 6021, that added together give a palindrome (7667).

The spelling of 16466021 in words is "sixteen million, four hundred sixty-six thousand, twenty-one".