13401660766387 has 4 divisors (see below), whose sum is σ = 13526909932536. Its totient is φ = 13276411600240.

The previous prime is 13401660766381. The next prime is 13401660766441. The reversal of 13401660766387 is 78366706610431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13401660766387 - 2¹¹ = 13401660764339 is a prime.

It is a super-2 number, since 2×13401660766387² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13401660766381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62624582914 + ... + 62624583127.

It is an arithmetic number, because the mean of its divisors is an integer number (3381727483134).

Almost surely, 2^{13401660766387} is an apocalyptic number.

13401660766387 is a deficient number, since it is larger than the sum of its proper divisors (125249166149).

13401660766387 is a wasteful number, since it uses less digits than its factorization.

13401660766387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125249166148.

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 13401660766387 in words is "thirteen trillion, four hundred one billion, six hundred sixty million, seven hundred sixty-six thousand, three hundred eighty-seven".