16616016 has 50 divisors (see below), whose sum is σ = 48095322. Its totient is φ = 5538240.

The previous prime is 16616009. The next prime is 16616023. The reversal of 16616016 is 61061661.

16616016 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 is an interprime number because it is at equal distance from previous prime (16616009) and next prime (16616023).

It can be written as a sum of positive squares in only one way, i.e., 10265616 + 6350400 = 3204^2 + 2520^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5115 + ... + 7706.

Almost surely, 2^16616016 is an apocalyptic number.

16616016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16616016 is an abundant number, since it is smaller than the sum of its proper divisors (31479306).

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

16616016 is a wasteful number, since it uses less digits than its factorization.

16616016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12841 (or 12826 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 16616016 is about 4076.2747699339. The cubic root of 16616016 is about 255.1774543357.

16616016 divided by its product of nonzero digits (1296) gives a palindrome (12821).

Adding to 16616016 its reverse (61061661), we get a palindrome (77677677).

It can be divided in two parts, 166160 and 16, that added together give a triangular number (166176 = T₅₇₆).

The spelling of 16616016 in words is "sixteen million, six hundred sixteen thousand, sixteen".