11660621371 has 4 divisors (see below), whose sum is σ = 13326424432. Its totient is φ = 9994818312.

The previous prime is 11660621251. The next prime is 11660621389. The reversal of 11660621371 is 17312606611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17312606611 = 31 ⋅558471181.

It is a cyclic number.

It is not a de Polignac number, because 11660621371 - 2²¹ = 11658524219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11640621371) 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, 832901520 + ... + 832901533.

It is an arithmetic number, because the mean of its divisors is an integer number (3331606108).

Almost surely, 2^11660621371 is an apocalyptic number.

11660621371 is a deficient number, since it is larger than the sum of its proper divisors (1665803061).

11660621371 is an equidigital number, since it uses as much as digits as its factorization.

11660621371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665803060.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 11660621371 in words is "eleven billion, six hundred sixty million, six hundred twenty-one thousand, three hundred seventy-one".