15660671 has 8 divisors (see below), whose sum is σ = 16909200. Its totient is φ = 14418432.

The previous prime is 15660661. The next prime is 15660691. The reversal of 15660671 is 17606651.

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

It is a cyclic number.

It is not a de Polignac number, because 15660671 - 2¹⁰ = 15659647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15660641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4496 + ... + 7178.

It is an arithmetic number, because the mean of its divisors is an integer number (2113650).

Almost surely, 2^15660671 is an apocalyptic number.

15660671 is a deficient number, since it is larger than the sum of its proper divisors (1248529).

15660671 is a wasteful number, since it uses less digits than its factorization.

15660671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 15660671 is about 3957.3565672049. The cubic root of 15660671 is about 250.1901007435.

The spelling of 15660671 in words is "fifteen million, six hundred sixty thousand, six hundred seventy-one".