13664406650 has 12 divisors (see below), whose sum is σ = 25415796462. Its totient is φ = 5465762640.

The previous prime is 13664406647. The next prime is 13664406653. The reversal of 13664406650 is 5660446631.

It is an interprime number because it is at equal distance from previous prime (13664406647) and next prime (13664406653).

It can be written as a sum of positive squares in 3 ways, for example, as 9771520201 + 3892886449 = 98851^2 + 62393^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13664406598 and 13664406607.

It is not an unprimeable number, because it can be changed into a prime (13664406653) 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 5 ways as a sum of consecutive naturals, for example, 136644017 + ... + 136644116.

Almost surely, 2^13664406650 is an apocalyptic number.

13664406650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13664406650 is a deficient number, since it is larger than the sum of its proper divisors (11751389812).

13664406650 is a wasteful number, since it uses less digits than its factorization.

13664406650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273288145 (or 273288140 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 13664406650 in words is "thirteen billion, six hundred sixty-four million, four hundred six thousand, six hundred fifty".