15918066 has 64 divisors (see below), whose sum is σ = 37647360. Its totient is φ = 4976640.

The previous prime is 15918043. The next prime is 15918079. The reversal of 15918066 is 66081951.

15918066 is a `hidden beast` number, since 1 + 591 + 8 + 0 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 15918066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61810 + ... + 62066.

It is an arithmetic number, because the mean of its divisors is an integer number (588240).

Almost surely, 2^15918066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15918066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18823680).

15918066 is an abundant number, since it is smaller than the sum of its proper divisors (21729294).

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

15918066 is a wasteful number, since it uses less digits than its factorization.

15918066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 15918066 is about 3989.7451046401. The cubic root of 15918066 is about 251.5533471279.

It can be divided in two parts, 159 and 18066, that added together give a square (18225 = 135²).

The spelling of 15918066 in words is "fifteen million, nine hundred eighteen thousand, sixty-six".