16667172 has 36 divisors (see below), whose sum is σ = 42254940. Its totient is φ = 5539392.

The previous prime is 16667149. The next prime is 16667173. The reversal of 16667172 is 27176661.

16667172 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3006756 + 13660416 = 1734^2 + 3696^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (16667173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23154 + ... + 23862.

Almost surely, 2^16667172 is an apocalyptic number.

16667172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16667172 is an abundant number, since it is smaller than the sum of its proper divisors (25587768).

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

16667172 is a wasteful number, since it uses less digits than its factorization.

16667172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1367 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 16667172 is about 4082.5447946103. The cubic root of 16667172 is about 255.4390590498.

The spelling of 16667172 in words is "sixteen million, six hundred sixty-seven thousand, one hundred seventy-two".