16420667 has 4 divisors (see below), whose sum is σ = 16652016. Its totient is φ = 16189320.

The previous prime is 16420661. The next prime is 16420673. The reversal of 16420667 is 76602461.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16420661) and next prime (16420673).

It is a cyclic number.

It is not a de Polignac number, because 16420667 - 2¹⁰ = 16419643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16420661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115568 + ... + 115709.

It is an arithmetic number, because the mean of its divisors is an integer number (4163004).

Almost surely, 2^16420667 is an apocalyptic number.

16420667 is a deficient number, since it is larger than the sum of its proper divisors (231349).

16420667 is an equidigital number, since it uses as much as digits as its factorization.

16420667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231348.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 16420667 is about 4052.2422188216. The cubic root of 16420667 is about 254.1734973111.

The spelling of 16420667 in words is "sixteen million, four hundred twenty thousand, six hundred sixty-seven".