16166772 has 18 divisors (see below), whose sum is σ = 40866098. Its totient is φ = 5388912.

The previous prime is 16166747. The next prime is 16166783. The reversal of 16166772 is 27766161.

It can be written as a sum of positive squares in only one way, i.e., 11655396 + 4511376 = 3414^2 + 2124^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×16166772² = 522729033799968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 449077 = 16166772 / (1 + 6 + 1 + 6 + 6 + 7 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224503 + ... + 224574.

Almost surely, 2^16166772 is an apocalyptic number.

16166772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16166772 is an abundant number, since it is smaller than the sum of its proper divisors (24699326).

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

16166772 is a wasteful number, since it uses less digits than its factorization.

16166772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449087 (or 449082 counting only the distinct ones).

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

The square root of 16166772 is about 4020.7924592050. The cubic root of 16166772 is about 252.8566837655.

The spelling of 16166772 in words is "sixteen million, one hundred sixty-six thousand, seven hundred seventy-two".