16671720 has 64 divisors (see below), whose sum is σ = 53867520. Its totient is φ = 4103424.

The previous prime is 16671701. The next prime is 16671731. The reversal of 16671720 is 2717661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3784 + ... + 6903.

It is an arithmetic number, because the mean of its divisors is an integer number (841680).

Almost surely, 2^16671720 is an apocalyptic number.

16671720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16671720 is an abundant number, since it is smaller than the sum of its proper divisors (37195800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16671720 is a wasteful number, since it uses less digits than its factorization.

16671720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10714 (or 10710 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 16671720 is about 4083.1017621411. The cubic root of 16671720 is about 255.4622909691.

It can be divided in two parts, 16671 and 720, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 16671720 in words is "sixteen million, six hundred seventy-one thousand, seven hundred twenty".