13666530 has 48 divisors (see below), whose sum is σ = 33743232. Its totient is φ = 3542400.

The previous prime is 13666517. The next prime is 13666537. The reversal of 13666530 is 3566631.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (13666537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50295 + ... + 50565.

It is an arithmetic number, because the mean of its divisors is an integer number (702984).

Almost surely, 2^13666530 is an apocalyptic number.

13666530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13666530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16871616).

13666530 is an abundant number, since it is smaller than the sum of its proper divisors (20076702).

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

13666530 is a wasteful number, since it uses less digits than its factorization.

13666530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 13666530 is about 3696.8270178628. The cubic root of 13666530 is about 239.0852330469.

It can be divided in two parts, 13666 and 530, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 13666530 in words is "thirteen million, six hundred sixty-six thousand, five hundred thirty".