13665700 has 18 divisors (see below), whose sum is σ = 29654786. Its totient is φ = 5466240.

The previous prime is 13665697. The next prime is 13665709. The reversal of 13665700 is 756631.

It can be written as a sum of positive squares in 3 ways, for example, as 1387684 + 12278016 = 1178^2 + 3504^2 .

It is not an unprimeable number, because it can be changed into a prime (13665709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68229 + ... + 68428.

Almost surely, 2^13665700 is an apocalyptic number.

13665700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13665700 is an abundant number, since it is smaller than the sum of its proper divisors (15989086).

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

13665700 is a wasteful number, since it uses less digits than its factorization.

13665700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136671 (or 136664 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 13665700 is about 3696.7147577275. The cubic root of 13665700 is about 239.0803928824.

It can be divided in two parts, 13665 and 700, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 13665700 in words is "thirteen million, six hundred sixty-five thousand, seven hundred".