13660334688121 has 9 divisors (see below), whose sum is σ = 15015123312133. Its totient is φ = 12418449120220.

The previous prime is 13660334688113. The next prime is 13660334688163. The reversal of 13660334688121 is 12188643306631.

The square root of 13660334688121 is 3695989.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 13660334688121 - 2³ = 13660334688113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13660334682121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 40487880 + ... + 40823878.

Almost surely, 2^{13660334688121} is an apocalyptic number.

13660334688121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13660334688121 is the 3695989-th square number.

13660334688121 is the 1847995-th centered octagonal number.

It is an amenable number.

13660334688121 is a deficient number, since it is larger than the sum of its proper divisors (1354788624012).

13660334688121 is an frugal number, since it uses more digits than its factorization.

13660334688121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672020 (or 336010 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 13660334688121 in words is "thirteen trillion, six hundred sixty billion, three hundred thirty-four million, six hundred eighty-eight thousand, one hundred twenty-one".