15987066 has 8 divisors (see below), whose sum is σ = 31974144. Its totient is φ = 5329020.

The previous prime is 15987061. The next prime is 15987067. The reversal of 15987066 is 66078951.

It is a sphenic number, since it is the product of 3 distinct primes.

15987066 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (15987061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332250 + ... + 1332261.

It is an arithmetic number, because the mean of its divisors is an integer number (3996768).

Almost surely, 2^15987066 is an apocalyptic number.

15987066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15987066 is a wasteful number, since it uses less digits than its factorization.

15987066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664516.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 15987066 is about 3998.3829231328. The cubic root of 15987066 is about 251.9162924295.

The spelling of 15987066 in words is "fifteen million, nine hundred eighty-seven thousand, sixty-six".