15982066 has 4 divisors (see below), whose sum is σ = 23973102. Its totient is φ = 7991032.

The previous prime is 15982049. The next prime is 15982117. The reversal of 15982066 is 66028951.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 5387041 = 3255^2 + 2321^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995515 + ... + 3995518.

Almost surely, 2^15982066 is an apocalyptic number.

15982066 is a deficient number, since it is larger than the sum of its proper divisors (7991036).

15982066 is an equidigital number, since it uses as much as digits as its factorization.

15982066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7991035.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 15982066 is about 3997.7576214673. The cubic root of 15982066 is about 251.8900271807.

It can be divided in two parts, 15 and 982066, that added together give a square (982081 = 991²).

The spelling of 15982066 in words is "fifteen million, nine hundred eighty-two thousand, sixty-six".