13664066240 has 56 divisors (see below), whose sum is σ = 35495526672. Its totient is φ = 4968750080.

The previous prime is 13664066209. The next prime is 13664066257. The reversal of 13664066240 is 4266046631.

It is a happy number.

It is a super-2 number, since 2×13664066240² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13664066194 and 13664066203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1937399 + ... + 1944438.

Almost surely, 2^13664066240 is an apocalyptic number.

13664066240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13664066240 is an abundant number, since it is smaller than the sum of its proper divisors (21831460432).

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

13664066240 is a wasteful number, since it uses less digits than its factorization.

13664066240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881865 (or 3881855 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 13664066240 in words is "thirteen billion, six hundred sixty-four million, sixty-six thousand, two hundred forty".