13664550 has 24 divisors (see below), whose sum is σ = 33888456. Its totient is φ = 3643840.

The previous prime is 13664543. The next prime is 13664569. The reversal of 13664550 is 5546631.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45399 + ... + 45698.

It is an arithmetic number, because the mean of its divisors is an integer number (1412019).

Almost surely, 2^13664550 is an apocalyptic number.

13664550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13664550 is an abundant number, since it is smaller than the sum of its proper divisors (20223906).

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

13664550 is a wasteful number, since it uses less digits than its factorization.

13664550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91112 (or 91107 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 13664550 is about 3696.5592109420. The cubic root of 13664550 is about 239.0736863064.

The spelling of 13664550 in words is "thirteen million, six hundred sixty-four thousand, five hundred fifty".