11660666654 has 32 divisors (see below), whose sum is σ = 21552061440. Its totient is φ = 4607723232.

The previous prime is 11660666593. The next prime is 11660666663. The reversal of 11660666654 is 45666606611.

It is a super-2 number, since 2×11660666654² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11660666599 and 11660666608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124427 + ... + 196985.

It is an arithmetic number, because the mean of its divisors is an integer number (673501920).

Almost surely, 2^11660666654 is an apocalyptic number.

11660666654 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11660666654 is a deficient number, since it is larger than the sum of its proper divisors (9891394786).

11660666654 is a wasteful number, since it uses less digits than its factorization.

11660666654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73464.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 11660666654 in words is "eleven billion, six hundred sixty million, six hundred sixty-six thousand, six hundred fifty-four".