11661851 has 8 divisors (see below), whose sum is σ = 12261024. Its totient is φ = 11070400.

The previous prime is 11661841. The next prime is 11661863. The reversal of 11661851 is 15816611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11661851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11661841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 5001.

It is an arithmetic number, because the mean of its divisors is an integer number (1532628).

Almost surely, 2^11661851 is an apocalyptic number.

11661851 is a deficient number, since it is larger than the sum of its proper divisors (599173).

11661851 is a wasteful number, since it uses less digits than its factorization.

11661851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861.

The product of its digits is 1440, while the sum is 29.

The square root of 11661851 is about 3414.9452411422. The cubic root of 11661851 is about 226.7718602947.

The spelling of 11661851 in words is "eleven million, six hundred sixty-one thousand, eight hundred fifty-one".