16661892 has 72 divisors (see below), whose sum is σ = 43703296. Its totient is φ = 4910976.

The previous prime is 16661881. The next prime is 16661903. The reversal of 16661892 is 29816661.

It is an interprime number because it is at equal distance from previous prime (16661881) and next prime (16661903).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 16661892.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131133 + ... + 131259.

Almost surely, 2^16661892 is an apocalyptic number.

16661892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16661892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21851648).

16661892 is an abundant number, since it is smaller than the sum of its proper divisors (27041404).

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

16661892 is a wasteful number, since it uses less digits than its factorization.

16661892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 174 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 16661892 is about 4081.8980878998. The cubic root of 16661892 is about 255.4120826541.

The spelling of 16661892 in words is "sixteen million, six hundred sixty-one thousand, eight hundred ninety-two".