16672191 has 8 divisors (see below), whose sum is σ = 22312704. Its totient is φ = 11073240.

The previous prime is 16672153. The next prime is 16672193. The reversal of 16672191 is 19127661.

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

It is not a de Polignac number, because 16672191 - 2¹⁰ = 16671167 is a prime.

It is a super-4 number, since 4×16672191⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16672193) 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, 9441 + ... + 11066.

It is an arithmetic number, because the mean of its divisors is an integer number (2789088).

Almost surely, 2^16672191 is an apocalyptic number.

16672191 is a deficient number, since it is larger than the sum of its proper divisors (5640513).

16672191 is a wasteful number, since it uses less digits than its factorization.

16672191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20781.

The product of its digits is 4536, while the sum is 33.

The square root of 16672191 is about 4083.1594384741. The cubic root of 16672191 is about 255.4646966718.

The spelling of 16672191 in words is "sixteen million, six hundred seventy-two thousand, one hundred ninety-one".