15666045 has 16 divisors (see below), whose sum is σ = 25114752. Its totient is φ = 8338880.

The previous prime is 15666043. The next prime is 15666073. The reversal of 15666045 is 54066651.

It is not a de Polignac number, because 15666045 - 2¹ = 15666043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15665997 and 15666015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15666041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14680 + ... + 15710.

It is an arithmetic number, because the mean of its divisors is an integer number (1569672).

Almost surely, 2^15666045 is an apocalyptic number.

15666045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15666045 is a deficient number, since it is larger than the sum of its proper divisors (9448707).

15666045 is a wasteful number, since it uses less digits than its factorization.

15666045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 15666045 is about 3958.0354975669. The cubic root of 15666045 is about 250.2187152654.

The spelling of 15666045 in words is "fifteen million, six hundred sixty-six thousand, forty-five".