11660651051 has 4 divisors (see below), whose sum is σ = 13326458352. Its totient is φ = 9994843752.

The previous prime is 11660651003. The next prime is 11660651059. The reversal of 11660651051 is 15015606611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15015606611 = 883 ⋅17005217.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11660651051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11660650999 and 11660651017.

It is not an unprimeable number, because it can be changed into a prime (11660651059) 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, 832903640 + ... + 832903653.

It is an arithmetic number, because the mean of its divisors is an integer number (3331614588).

Almost surely, 2^11660651051 is an apocalyptic number.

11660651051 is a deficient number, since it is larger than the sum of its proper divisors (1665807301).

11660651051 is an equidigital number, since it uses as much as digits as its factorization.

11660651051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665807300.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 11660651051 in words is "eleven billion, six hundred sixty million, six hundred fifty-one thousand, fifty-one".