16667671 has 4 divisors (see below), whose sum is σ = 16685200. Its totient is φ = 16650144.

The previous prime is 16667659. The next prime is 16667681. The reversal of 16667671 is 17676661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17676661 = 337 ⋅52453.

It is a cyclic number.

It is not a de Polignac number, because 16667671 - 2¹⁹ = 16143383 is a prime.

It is a super-2 number, since 2×16667671² = 555622513128482, 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 (16667641) 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, 7251 + ... + 9268.

It is an arithmetic number, because the mean of its divisors is an integer number (4171300).

Almost surely, 2^16667671 is an apocalyptic number.

16667671 is a deficient number, since it is larger than the sum of its proper divisors (17529).

16667671 is a wasteful number, since it uses less digits than its factorization.

16667671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17528.

The product of its digits is 63504, while the sum is 40.

The square root of 16667671 is about 4082.6059079955. The cubic root of 16667671 is about 255.4416082288.

The spelling of 16667671 in words is "sixteen million, six hundred sixty-seven thousand, six hundred seventy-one".