13660700641 has 27 divisors (see below), whose sum is σ = 16222245201. Its totient is φ = 11470037544.

The previous prime is 13660700629. The next prime is 13660700689. The reversal of 13660700641 is 14600706631.

The square root of 13660700641 is 116879.

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

It is not a de Polignac number, because 13660700641 - 2⁹ = 13660700129 is a prime.

It is a super-2 number, since 2×13660700641² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13660700597 and 13660700606.

It is not an unprimeable number, because it can be changed into a prime (13660700611) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 48270886 + ... + 48271168.

Almost surely, 2^13660700641 is an apocalyptic number.

13660700641 is the 116879-th square number.

13660700641 is the 58440-th centered octagonal number.

It is an amenable number.

13660700641 is a deficient number, since it is larger than the sum of its proper divisors (2561544560).

13660700641 is an frugal number, since it uses more digits than its factorization.

13660700641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 13660700641 in words is "thirteen billion, six hundred sixty million, seven hundred thousand, six hundred forty-one".