15999066 has 16 divisors (see below), whose sum is σ = 35553600. Its totient is φ = 5333004.

The previous prime is 15999047. The next prime is 15999073. The reversal of 15999066 is 66099951.

It is a super-2 number, since 2×15999066² = 511940225744712, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148086 + ... + 148193.

It is an arithmetic number, because the mean of its divisors is an integer number (2222100).

Almost surely, 2^15999066 is an apocalyptic number.

15999066 is an abundant number, since it is smaller than the sum of its proper divisors (19554534).

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

15999066 is a wasteful number, since it uses less digits than its factorization.

15999066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296290 (or 296284 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 15999066 is about 3999.8832482961. The cubic root of 15999066 is about 251.9793066908.

It can be divided in two parts, 159 and 99066, that added together give a square (99225 = 315²).

The spelling of 15999066 in words is "fifteen million, nine hundred ninety-nine thousand, sixty-six".